diff --git a/netstandard/ref/System.cs b/netstandard/ref/System.cs
index a3d1a5252..875220dd2 100644
--- a/netstandard/ref/System.cs
+++ b/netstandard/ref/System.cs
@@ -566,21 +566,47 @@ public static partial class BitConverter
         public static byte[] GetBytes(ulong value) { throw null; }
         public static double Int64BitsToDouble(long value) { throw null; }
         public static bool ToBoolean(byte[] value, int startIndex) { throw null; }
+        public static bool ToBoolean(System.ReadOnlySpan<byte> value) { throw null; }
         public static char ToChar(byte[] value, int startIndex) { throw null; }
+        public static char ToChar(System.ReadOnlySpan<byte> value) { throw null; }
         public static double ToDouble(byte[] value, int startIndex) { throw null; }
+        public static double ToDouble(System.ReadOnlySpan<byte> value) { throw null; }
         public static short ToInt16(byte[] value, int startIndex) { throw null; }
+        public static short ToInt16(System.ReadOnlySpan<byte> value) { throw null; }
         public static int ToInt32(byte[] value, int startIndex) { throw null; }
+        public static int ToInt32(System.ReadOnlySpan<byte> value) { throw null; }
         public static long ToInt64(byte[] value, int startIndex) { throw null; }
+        public static long ToInt64(System.ReadOnlySpan<byte> value) { throw null; }
         public static float ToSingle(byte[] value, int startIndex) { throw null; }
+        public static float ToSingle(System.ReadOnlySpan<byte> value) { throw null; }
         public static string ToString(byte[] value) { throw null; }
         public static string ToString(byte[] value, int startIndex) { throw null; }
         public static string ToString(byte[] value, int startIndex, int length) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static ushort ToUInt16(byte[] value, int startIndex) { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static ushort ToUInt16(System.ReadOnlySpan<byte> value) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static uint ToUInt32(byte[] value, int startIndex) { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static uint ToUInt32(System.ReadOnlySpan<byte> value) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static ulong ToUInt64(byte[] value, int startIndex) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static ulong ToUInt64(System.ReadOnlySpan<byte> value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, bool value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, char value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, double value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, short value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, int value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, long value) { throw null; }
+        public static bool TryWriteBytes(System.Span<byte> destination, float value) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryWriteBytes(System.Span<byte> destination, ushort value) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryWriteBytes(System.Span<byte> destination, uint value) { throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryWriteBytes(System.Span<byte> destination, ulong value) { throw null; }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential)]
     public partial struct Boolean : System.IComparable, System.IComparable<bool>, System.IConvertible, System.IEquatable<bool>
@@ -593,6 +619,7 @@ public partial struct Boolean : System.IComparable, System.IComparable<bool>, Sy
         public override System.Boolean Equals(object obj) { throw null; }
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        public static System.Boolean Parse(System.ReadOnlySpan<char> value) { throw null; }
         public static System.Boolean Parse(string value) { throw null; }
         System.Boolean System.IConvertible.ToBoolean(System.IFormatProvider provider) { throw null; }
         byte System.IConvertible.ToByte(System.IFormatProvider provider) { throw null; }
@@ -611,6 +638,8 @@ public partial struct Boolean : System.IComparable, System.IComparable<bool>, Sy
         ulong System.IConvertible.ToUInt64(System.IFormatProvider provider) { throw null; }
         public override string ToString() { throw null; }
         public string ToString(System.IFormatProvider provider) { throw null; }
+        public System.Boolean TryFormat(System.Span<char> destination, out int charsWritten) { charsWritten = default(int); throw null; }
+        public static System.Boolean TryParse(System.ReadOnlySpan<char> value, out System.Boolean result) { result = default(bool); throw null; }
         public static System.Boolean TryParse(string value, out System.Boolean result) { result = default(bool); throw null; }
     }
     public static partial class Buffer
@@ -635,6 +664,7 @@ public partial struct Byte : System.IComparable, System.IComparable<byte>, Syste
         public override bool Equals(object obj) { throw null; }
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        public static System.Byte Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
         public static System.Byte Parse(string s) { throw null; }
         public static System.Byte Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Byte Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -658,6 +688,9 @@ public partial struct Byte : System.IComparable, System.IComparable<byte>, Syste
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Byte result) { result = default(byte); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Byte result) { result = default(byte); throw null; }
         public static bool TryParse(string s, out System.Byte result) { result = default(byte); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Byte result) { result = default(byte); throw null; }
     }
@@ -1084,6 +1117,7 @@ public static partial class Convert
         public static string ToBase64String(byte[] inArray, System.Base64FormattingOptions options) { throw null; }
         public static string ToBase64String(byte[] inArray, int offset, int length) { throw null; }
         public static string ToBase64String(byte[] inArray, int offset, int length, System.Base64FormattingOptions options) { throw null; }
+        public static string ToBase64String(System.ReadOnlySpan<byte> bytes, System.Base64FormattingOptions options = (System.Base64FormattingOptions)(0)) { throw null; }
         public static bool ToBoolean(bool value) { throw null; }
         public static bool ToBoolean(byte value) { throw null; }
         public static bool ToBoolean(char value) { throw null; }
@@ -1504,6 +1538,9 @@ public static partial class Convert
         public static ulong ToUInt64(uint value) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static ulong ToUInt64(ulong value) { throw null; }
+        public static bool TryFromBase64Chars(System.ReadOnlySpan<char> chars, System.Span<byte> bytes, out int bytesWritten) { bytesWritten = default(int); throw null; }
+        public static bool TryFromBase64String(string s, System.Span<byte> bytes, out int bytesWritten) { bytesWritten = default(int); throw null; }
+        public static bool TryToBase64Chars(System.ReadOnlySpan<byte> bytes, System.Span<char> chars, out int charsWritten, System.Base64FormattingOptions options = (System.Base64FormattingOptions)(0)) { charsWritten = default(int); throw null; }
     }
     public delegate TOutput Converter<in TInput, out TOutput>(TInput input);
     public sealed partial class DataMisalignedException : System.SystemException
@@ -1580,9 +1617,12 @@ public DataMisalignedException(string message, System.Exception innerException)
         public static bool operator <=(System.DateTime t1, System.DateTime t2) { throw null; }
         public static System.TimeSpan operator -(System.DateTime d1, System.DateTime d2) { throw null; }
         public static System.DateTime operator -(System.DateTime d, System.TimeSpan t) { throw null; }
+        public static System.DateTime Parse(System.ReadOnlySpan<char> s, System.IFormatProvider provider = null, System.Globalization.DateTimeStyles styles = (System.Globalization.DateTimeStyles)(0)) { throw null; }
         public static System.DateTime Parse(string s) { throw null; }
         public static System.DateTime Parse(string s, System.IFormatProvider provider) { throw null; }
         public static System.DateTime Parse(string s, System.IFormatProvider provider, System.Globalization.DateTimeStyles styles) { throw null; }
+        public static System.DateTime ParseExact(System.ReadOnlySpan<char> s, System.ReadOnlySpan<char> format, System.IFormatProvider provider, System.Globalization.DateTimeStyles style = (System.Globalization.DateTimeStyles)(0)) { throw null; }
+        public static System.DateTime ParseExact(System.ReadOnlySpan<char> s, string[] formats, System.IFormatProvider provider, System.Globalization.DateTimeStyles style = (System.Globalization.DateTimeStyles)(0)) { throw null; }
         public static System.DateTime ParseExact(string s, string format, System.IFormatProvider provider) { throw null; }
         public static System.DateTime ParseExact(string s, string format, System.IFormatProvider provider, System.Globalization.DateTimeStyles style) { throw null; }
         public static System.DateTime ParseExact(string s, string[] formats, System.IFormatProvider provider, System.Globalization.DateTimeStyles style) { throw null; }
@@ -1619,8 +1659,13 @@ void System.Runtime.Serialization.ISerializable.GetObjectData(System.Runtime.Ser
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
         public System.DateTime ToUniversalTime() { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.DateTime result) { result = default(System.DateTime); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.IFormatProvider provider, System.Globalization.DateTimeStyles styles, out System.DateTime result) { result = default(System.DateTime); throw null; }
         public static bool TryParse(string s, out System.DateTime result) { result = default(System.DateTime); throw null; }
         public static bool TryParse(string s, System.IFormatProvider provider, System.Globalization.DateTimeStyles styles, out System.DateTime result) { result = default(System.DateTime); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> s, System.ReadOnlySpan<char> format, System.IFormatProvider provider, System.Globalization.DateTimeStyles style, out System.DateTime result) { result = default(System.DateTime); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> s, string[] formats, System.IFormatProvider provider, System.Globalization.DateTimeStyles style, out System.DateTime result) { result = default(System.DateTime); throw null; }
         public static bool TryParseExact(string s, string format, System.IFormatProvider provider, System.Globalization.DateTimeStyles style, out System.DateTime result) { result = default(System.DateTime); throw null; }
         public static bool TryParseExact(string s, string[] formats, System.IFormatProvider provider, System.Globalization.DateTimeStyles style, out System.DateTime result) { result = default(System.DateTime); throw null; }
     }
@@ -1688,9 +1733,12 @@ public partial struct DateTimeOffset : System.IComparable, System.IComparable<Sy
         public static bool operator <=(System.DateTimeOffset left, System.DateTimeOffset right) { throw null; }
         public static System.TimeSpan operator -(System.DateTimeOffset left, System.DateTimeOffset right) { throw null; }
         public static System.DateTimeOffset operator -(System.DateTimeOffset dateTimeOffset, System.TimeSpan timeSpan) { throw null; }
+        public static System.DateTimeOffset Parse(System.ReadOnlySpan<char> input, System.IFormatProvider formatProvider = null, System.Globalization.DateTimeStyles styles = (System.Globalization.DateTimeStyles)(0)) { throw null; }
         public static System.DateTimeOffset Parse(string input) { throw null; }
         public static System.DateTimeOffset Parse(string input, System.IFormatProvider formatProvider) { throw null; }
         public static System.DateTimeOffset Parse(string input, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles) { throw null; }
+        public static System.DateTimeOffset ParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles = (System.Globalization.DateTimeStyles)(0)) { throw null; }
+        public static System.DateTimeOffset ParseExact(System.ReadOnlySpan<char> input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles = (System.Globalization.DateTimeStyles)(0)) { throw null; }
         public static System.DateTimeOffset ParseExact(string input, string format, System.IFormatProvider formatProvider) { throw null; }
         public static System.DateTimeOffset ParseExact(string input, string format, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles) { throw null; }
         public static System.DateTimeOffset ParseExact(string input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles) { throw null; }
@@ -1709,8 +1757,13 @@ void System.Runtime.Serialization.ISerializable.GetObjectData(System.Runtime.Ser
         public System.DateTimeOffset ToUniversalTime() { throw null; }
         public long ToUnixTimeMilliseconds() { throw null; }
         public long ToUnixTimeSeconds() { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider formatProvider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> input, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> input, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
         public static bool TryParse(string input, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
         public static bool TryParse(string input, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
         public static bool TryParseExact(string input, string format, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
         public static bool TryParseExact(string input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.DateTimeStyles styles, out System.DateTimeOffset result) { result = default(System.DateTimeOffset); throw null; }
     }
@@ -1832,6 +1885,7 @@ public partial struct Decimal : System.IComparable, System.IComparable<decimal>,
         public static System.Decimal operator -(System.Decimal d1, System.Decimal d2) { throw null; }
         public static System.Decimal operator -(System.Decimal d) { throw null; }
         public static System.Decimal operator +(System.Decimal d) { throw null; }
+        public static System.Decimal Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(111), System.IFormatProvider provider = null) { throw null; }
         public static System.Decimal Parse(string s) { throw null; }
         public static System.Decimal Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Decimal Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -1878,6 +1932,9 @@ void System.Runtime.Serialization.IDeserializationCallback.OnDeserialization(obj
         [System.CLSCompliantAttribute(false)]
         public static ulong ToUInt64(System.Decimal d) { throw null; }
         public static System.Decimal Truncate(System.Decimal d) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Decimal result) { result = default(decimal); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Decimal result) { result = default(decimal); throw null; }
         public static bool TryParse(string s, out System.Decimal result) { result = default(decimal); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Decimal result) { result = default(decimal); throw null; }
     }
@@ -1953,6 +2010,7 @@ public partial struct Double : System.IComparable, System.IComparable<double>, S
         public static bool operator !=(System.Double left, System.Double right) { throw null; }
         public static bool operator <(System.Double left, System.Double right) { throw null; }
         public static bool operator <=(System.Double left, System.Double right) { throw null; }
+        public static System.Double Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(231), System.IFormatProvider provider = null) { throw null; }
         public static System.Double Parse(string s) { throw null; }
         public static System.Double Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Double Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -1976,6 +2034,9 @@ public partial struct Double : System.IComparable, System.IComparable<double>, S
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Double result) { result = default(double); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Double result) { result = default(double); throw null; }
         public static bool TryParse(string s, out System.Double result) { result = default(double); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Double result) { result = default(double); throw null; }
     }
@@ -2311,6 +2372,7 @@ public partial struct Guid : System.IComparable, System.IComparable<System.Guid>
         public Guid(byte[] b) { throw null;}
         public Guid(int a, short b, short c, byte d, byte e, byte f, byte g, byte h, byte i, byte j, byte k) { throw null;}
         public Guid(int a, short b, short c, byte[] d) { throw null;}
+        public Guid(System.ReadOnlySpan<byte> b) { throw null; }
         public Guid(string g) { throw null;}
         [System.CLSCompliantAttribute(false)]
         public Guid(uint a, ushort b, ushort c, byte d, byte e, byte f, byte g, byte h, byte i, byte j, byte k) { throw null;}
@@ -2322,14 +2384,20 @@ public partial struct Guid : System.IComparable, System.IComparable<System.Guid>
         public static System.Guid NewGuid() { throw null; }
         public static bool operator ==(System.Guid a, System.Guid b) { throw null; }
         public static bool operator !=(System.Guid a, System.Guid b) { throw null; }
+        public static System.Guid Parse(System.ReadOnlySpan<char> input) { throw null; }
         public static System.Guid Parse(string input) { throw null; }
+        public static System.Guid ParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format) { throw null; }
         public static System.Guid ParseExact(string input, string format) { throw null; }
         public byte[] ToByteArray() { throw null; }
         public override string ToString() { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>)) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> input, out System.Guid result) { result = default(System.Guid); throw null; }
         public static bool TryParse(string input, out System.Guid result) { result = default(System.Guid); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, out System.Guid result) { result = default(System.Guid); throw null; }
         public static bool TryParseExact(string input, string format, out System.Guid result) { result = default(System.Guid); throw null; }
+        public bool TryWriteBytes(System.Span<byte> destination) { throw null; }
     }
     public partial class HttpStyleUriParser : System.UriParser
     {
@@ -2424,6 +2492,7 @@ public partial struct Int16 : System.IComparable, System.IComparable<short>, Sys
         public override bool Equals(object obj) { throw null; }
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        public static System.Int16 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
         public static System.Int16 Parse(string s) { throw null; }
         public static System.Int16 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Int16 Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -2447,6 +2516,9 @@ public partial struct Int16 : System.IComparable, System.IComparable<short>, Sys
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int16 result) { result = default(short); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Int16 result) { result = default(short); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int16 result) { result = default(short); throw null; }
         public static bool TryParse(string s, out System.Int16 result) { result = default(short); throw null; }
     }
@@ -2461,6 +2533,7 @@ public partial struct Int32 : System.IComparable, System.IComparable<int>, Syste
         public override bool Equals(object obj) { throw null; }
         public override System.Int32 GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        public static System.Int32 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
         public static System.Int32 Parse(string s) { throw null; }
         public static System.Int32 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Int32 Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -2484,6 +2557,9 @@ public partial struct Int32 : System.IComparable, System.IComparable<int>, Syste
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out System.Int32 charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int32 result) { result = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Int32 result) { result = default(int); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int32 result) { result = default(int); throw null; }
         public static bool TryParse(string s, out System.Int32 result) { result = default(int); throw null; }
     }
@@ -2498,6 +2574,7 @@ public partial struct Int64 : System.IComparable, System.IComparable<long>, Syst
         public override bool Equals(object obj) { throw null; }
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
+        public static System.Int64 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
         public static System.Int64 Parse(string s) { throw null; }
         public static System.Int64 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Int64 Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -2521,6 +2598,9 @@ public partial struct Int64 : System.IComparable, System.IComparable<long>, Syst
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int64 result) { result = default(long); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Int64 result) { result = default(long); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Int64 result) { result = default(long); throw null; }
         public static bool TryParse(string s, out System.Int64 result) { result = default(long); throw null; }
     }
@@ -3126,6 +3206,7 @@ public Random(int Seed) { }
         public virtual int Next(int maxValue) { throw null; }
         public virtual int Next(int minValue, int maxValue) { throw null; }
         public virtual void NextBytes(byte[] buffer) { }
+        public virtual void NextBytes(System.Span<byte> buffer) { }
         public virtual double NextDouble() { throw null; }
         protected virtual double Sample() { throw null; }
     }
@@ -3257,6 +3338,8 @@ public partial struct SByte : System.IComparable, System.IComparable<sbyte>, Sys
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static System.SByte Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static System.SByte Parse(string s) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static System.SByte Parse(string s, System.Globalization.NumberStyles style) { throw null; }
@@ -3283,6 +3366,11 @@ public partial struct SByte : System.IComparable, System.IComparable<sbyte>, Sys
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.SByte result) { result = default(sbyte); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.SByte result) { result = default(sbyte); throw null; }
         [System.CLSCompliantAttribute(false)]
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.SByte result) { result = default(sbyte); throw null; }
         [System.CLSCompliantAttribute(false)]
@@ -3318,6 +3406,7 @@ public partial struct Single : System.IComparable, System.IComparable<float>, Sy
         public static bool operator !=(System.Single left, System.Single right) { throw null; }
         public static bool operator <(System.Single left, System.Single right) { throw null; }
         public static bool operator <=(System.Single left, System.Single right) { throw null; }
+        public static System.Single Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(231), System.IFormatProvider provider = null) { throw null; }
         public static System.Single Parse(string s) { throw null; }
         public static System.Single Parse(string s, System.Globalization.NumberStyles style) { throw null; }
         public static System.Single Parse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider) { throw null; }
@@ -3341,6 +3430,9 @@ public partial struct Single : System.IComparable, System.IComparable<float>, Sy
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Single result) { result = default(float); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.Single result) { result = default(float); throw null; }
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.Single result) { result = default(float); throw null; }
         public static bool TryParse(string s, out System.Single result) { result = default(float); throw null; }
     }
@@ -3403,6 +3495,7 @@ public unsafe String(char* value, int startIndex, int length) { }
         public String(char c, int count) { }
         public String(char[] value) { }
         public String(char[] value, int startIndex, int length) { }
+        public String(System.ReadOnlySpan<char> value) { }
         [System.CLSCompliantAttribute(false)]
         public unsafe String(sbyte* value) { }
         [System.CLSCompliantAttribute(false)]
@@ -3498,6 +3591,7 @@ public void CopyTo(int sourceIndex, char[] destination, int destinationIndex, in
         public System.String Normalize() { throw null; }
         public System.String Normalize(System.Text.NormalizationForm normalizationForm) { throw null; }
         public static bool operator ==(System.String a, System.String b) { throw null; }
+        public static implicit operator System.ReadOnlySpan<char>(System.String value) { throw null; }
         public static bool operator !=(System.String a, System.String b) { throw null; }
         public System.String PadLeft(int totalWidth) { throw null; }
         public System.String PadLeft(int totalWidth, char paddingChar) { throw null; }
@@ -3661,8 +3755,11 @@ public partial struct TimeSpan : System.IComparable, System.IComparable<System.T
         public static System.TimeSpan operator -(System.TimeSpan t1, System.TimeSpan t2) { throw null; }
         public static System.TimeSpan operator -(System.TimeSpan t) { throw null; }
         public static System.TimeSpan operator +(System.TimeSpan t) { throw null; }
+        public static System.TimeSpan Parse(System.ReadOnlySpan<char> input, System.IFormatProvider formatProvider = null) { throw null; }
         public static System.TimeSpan Parse(string s) { throw null; }
         public static System.TimeSpan Parse(string input, System.IFormatProvider formatProvider) { throw null; }
+        public static System.TimeSpan ParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles = (System.Globalization.TimeSpanStyles)(0)) { throw null; }
+        public static System.TimeSpan ParseExact(System.ReadOnlySpan<char> input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles = (System.Globalization.TimeSpanStyles)(0)) { throw null; }
         public static System.TimeSpan ParseExact(string input, string format, System.IFormatProvider formatProvider) { throw null; }
         public static System.TimeSpan ParseExact(string input, string format, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles) { throw null; }
         public static System.TimeSpan ParseExact(string input, string[] formats, System.IFormatProvider formatProvider) { throw null; }
@@ -3671,8 +3768,15 @@ public partial struct TimeSpan : System.IComparable, System.IComparable<System.T
         public override string ToString() { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider formatProvider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider formatProvider = null) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> input, System.IFormatProvider formatProvider, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
         public static bool TryParse(string input, System.IFormatProvider formatProvider, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
         public static bool TryParse(string s, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, System.ReadOnlySpan<char> format, System.IFormatProvider formatProvider, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
+        public static bool TryParseExact(System.ReadOnlySpan<char> input, string[] formats, System.IFormatProvider formatProvider, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
         public static bool TryParseExact(string input, string format, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
         public static bool TryParseExact(string input, string format, System.IFormatProvider formatProvider, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
         public static bool TryParseExact(string input, string[] formats, System.IFormatProvider formatProvider, System.Globalization.TimeSpanStyles styles, out System.TimeSpan result) { result = default(System.TimeSpan); throw null; }
@@ -4286,6 +4390,8 @@ public partial struct UInt16 : System.IComparable, System.IComparable<ushort>, S
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static System.UInt16 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static System.UInt16 Parse(string s) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static System.UInt16 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
@@ -4312,6 +4418,11 @@ public partial struct UInt16 : System.IComparable, System.IComparable<ushort>, S
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt16 result) { result = default(ushort); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.UInt16 result) { result = default(ushort); throw null; }
         [System.CLSCompliantAttribute(false)]
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt16 result) { result = default(ushort); throw null; }
         [System.CLSCompliantAttribute(false)]
@@ -4330,6 +4441,8 @@ public partial struct UInt32 : System.IComparable, System.IComparable<uint>, Sys
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static System.UInt32 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static System.UInt32 Parse(string s) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static System.UInt32 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
@@ -4356,6 +4469,11 @@ public partial struct UInt32 : System.IComparable, System.IComparable<uint>, Sys
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt32 result) { result = default(uint); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.UInt32 result) { result = default(uint); throw null; }
         [System.CLSCompliantAttribute(false)]
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt32 result) { result = default(uint); throw null; }
         [System.CLSCompliantAttribute(false)]
@@ -4374,6 +4492,8 @@ public partial struct UInt64 : System.IComparable, System.IComparable<ulong>, Sy
         public override int GetHashCode() { throw null; }
         public System.TypeCode GetTypeCode() { throw null; }
         [System.CLSCompliantAttribute(false)]
+        public static System.UInt64 Parse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style = (System.Globalization.NumberStyles)(7), System.IFormatProvider provider = null) { throw null; }
+        [System.CLSCompliantAttribute(false)]
         public static System.UInt64 Parse(string s) { throw null; }
         [System.CLSCompliantAttribute(false)]
         public static System.UInt64 Parse(string s, System.Globalization.NumberStyles style) { throw null; }
@@ -4400,6 +4520,11 @@ public partial struct UInt64 : System.IComparable, System.IComparable<ulong>, Sy
         public string ToString(System.IFormatProvider provider) { throw null; }
         public string ToString(string format) { throw null; }
         public string ToString(string format, System.IFormatProvider provider) { throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten, System.ReadOnlySpan<char> format = default(System.ReadOnlySpan<char>), System.IFormatProvider provider = null) { charsWritten = default(int); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt64 result) { result = default(ulong); throw null; }
+        [System.CLSCompliantAttribute(false)]
+        public static bool TryParse(System.ReadOnlySpan<char> s, out System.UInt64 result) { result = default(ulong); throw null; }
         [System.CLSCompliantAttribute(false)]
         public static bool TryParse(string s, System.Globalization.NumberStyles style, System.IFormatProvider provider, out System.UInt64 result) { result = default(ulong); throw null; }
         [System.CLSCompliantAttribute(false)]
@@ -4864,9 +4989,13 @@ public Version(string version) { }
         public static bool operator !=(System.Version v1, System.Version v2) { throw null; }
         public static bool operator <(System.Version v1, System.Version v2) { throw null; }
         public static bool operator <=(System.Version v1, System.Version v2) { throw null; }
+        public static System.Version Parse(System.ReadOnlySpan<char> input) { throw null; }
         public static System.Version Parse(string input) { throw null; }
         public override string ToString() { throw null; }
         public string ToString(int fieldCount) { throw null; }
+        public bool TryFormat(System.Span<char> destination, int fieldCount, out int charsWritten) { charsWritten = default(int); throw null; }
+        public bool TryFormat(System.Span<char> destination, out int charsWritten) { charsWritten = default(int); throw null; }
+        public static bool TryParse(System.ReadOnlySpan<char> input, out System.Version result) { result = default(System.Version); throw null; }
         public static bool TryParse(string input, out System.Version result) { result = default(System.Version); throw null; }
     }
     [System.Runtime.InteropServices.StructLayoutAttribute(System.Runtime.InteropServices.LayoutKind.Sequential, Size=1)]
diff --git a/netstandard/src/ApiCompatBaseline.net461.txt b/netstandard/src/ApiCompatBaseline.net461.txt
index 3ab10102d..d08365299 100644
--- a/netstandard/src/ApiCompatBaseline.net461.txt
+++ b/netstandard/src/ApiCompatBaseline.net461.txt
@@ -2,15 +2,110 @@ Compat issues with assembly netstandard:
 MembersMustExist : Member 'System.AppContext.GetData(System.String)' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.AppContext.TargetFrameworkName.get()' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.StringNormalizationExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 CannotRemoveBaseTypeOrInterface : Type 'System.Tuple<T1>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Tuple<T1, T2>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
@@ -34,6 +129,18 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1, T2>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
@@ -43,6 +150,10 @@ CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1, T2, T3, T4, T5>' d
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1, T2, T3, T4, T5, T6>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1, T2, T3, T4, T5, T6, T7>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.ValueTuple<T1, T2, T3, T4, T5, T6, T7, TRest>' does not implement interface 'System.Runtime.CompilerServices.ITuple' in the implementation but it does in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -374,4 +485,4 @@ MembersMustExist : Member 'System.Xml.Linq.XNode.WriteToAsync(System.Xml.XmlWrit
 MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.XPath.XDocumentExtensions' does not exist in the implementation but it does exist in the contract.
-Total Issues: 375
+Total Issues: 486
diff --git a/netstandard/src/ApiCompatBaseline.xamarin.android.txt b/netstandard/src/ApiCompatBaseline.xamarin.android.txt
index d285ba7f1..c863482d5 100644
--- a/netstandard/src/ApiCompatBaseline.xamarin.android.txt
+++ b/netstandard/src/ApiCompatBaseline.xamarin.android.txt
@@ -1,13 +1,108 @@
 Compat issues with assembly netstandard:
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
@@ -22,6 +117,22 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -241,4 +352,4 @@ MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(S
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.Serialization.SchemaImporter' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Xml.Serialization.XmlSchemaImporter' does not inherit from base type 'System.Xml.Serialization.SchemaImporter' in the implementation but it does in the contract.
-Total Issues: 242
+Total Issues: 353
diff --git a/netstandard/src/ApiCompatBaseline.xamarin.ios.txt b/netstandard/src/ApiCompatBaseline.xamarin.ios.txt
index ba7b604f0..390bc8707 100644
--- a/netstandard/src/ApiCompatBaseline.xamarin.ios.txt
+++ b/netstandard/src/ApiCompatBaseline.xamarin.ios.txt
@@ -1,13 +1,108 @@
 Compat issues with assembly netstandard:
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
@@ -22,6 +117,22 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -248,4 +359,4 @@ MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(S
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.Serialization.SchemaImporter' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Xml.Serialization.XmlSchemaImporter' does not inherit from base type 'System.Xml.Serialization.SchemaImporter' in the implementation but it does in the contract.
-Total Issues: 249
+Total Issues: 360
diff --git a/netstandard/src/ApiCompatBaseline.xamarin.mac.txt b/netstandard/src/ApiCompatBaseline.xamarin.mac.txt
index d285ba7f1..c863482d5 100644
--- a/netstandard/src/ApiCompatBaseline.xamarin.mac.txt
+++ b/netstandard/src/ApiCompatBaseline.xamarin.mac.txt
@@ -1,13 +1,108 @@
 Compat issues with assembly netstandard:
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
@@ -22,6 +117,22 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -241,4 +352,4 @@ MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(S
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.Serialization.SchemaImporter' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Xml.Serialization.XmlSchemaImporter' does not inherit from base type 'System.Xml.Serialization.SchemaImporter' in the implementation but it does in the contract.
-Total Issues: 242
+Total Issues: 353
diff --git a/netstandard/src/ApiCompatBaseline.xamarin.tvos.txt b/netstandard/src/ApiCompatBaseline.xamarin.tvos.txt
index ba7b604f0..390bc8707 100644
--- a/netstandard/src/ApiCompatBaseline.xamarin.tvos.txt
+++ b/netstandard/src/ApiCompatBaseline.xamarin.tvos.txt
@@ -1,13 +1,108 @@
 Compat issues with assembly netstandard:
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
@@ -22,6 +117,22 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -248,4 +359,4 @@ MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(S
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.Serialization.SchemaImporter' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Xml.Serialization.XmlSchemaImporter' does not inherit from base type 'System.Xml.Serialization.SchemaImporter' in the implementation but it does in the contract.
-Total Issues: 249
+Total Issues: 360
diff --git a/netstandard/src/ApiCompatBaseline.xamarin.watchos.txt b/netstandard/src/ApiCompatBaseline.xamarin.watchos.txt
index ba7b604f0..390bc8707 100644
--- a/netstandard/src/ApiCompatBaseline.xamarin.watchos.txt
+++ b/netstandard/src/ApiCompatBaseline.xamarin.watchos.txt
@@ -1,13 +1,108 @@
 Compat issues with assembly netstandard:
 TypeCannotChangeClassification : Type 'System.ArraySegment<T>' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.BitConverter.ToBoolean(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToChar(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToDouble(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToSingle(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt16(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt32(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.ToUInt64(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Char)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.BitConverter.TryWriteBytes(System.Span<System.Byte>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Boolean.TryParse(System.ReadOnlySpan<System.Char>, System.Boolean)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Byte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Byte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Byte)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.ConsoleKeyInfo' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.Convert.ToBase64String(System.ReadOnlySpan<System.Byte>, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64Chars(System.ReadOnlySpan<System.Char>, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryFromBase64String(System.String, System.Span<System.Byte>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Convert.TryToBase64Chars(System.ReadOnlySpan<System.Byte>, System.Span<System.Char>, System.Int32, System.Base64FormattingOptions)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.DateTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
+MembersMustExist : Member 'System.DateTime.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTime.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTime)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.DateTimeOffset.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.DateTimeStyles, System.DateTimeOffset)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Decimal.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Decimal)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Double.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Double)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid..ctor(System.ReadOnlySpan<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParse(System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.Guid)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Guid.TryWriteBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int16.TryParse(System.ReadOnlySpan<System.Char>, System.Int16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int32.TryParse(System.ReadOnlySpan<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Int64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Int64.TryParse(System.ReadOnlySpan<System.Char>, System.Int64)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Memory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.MemoryExtensions' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Random.NextBytes(System.Span<System.Byte>)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlyMemory<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.ReadOnlySpan<T>' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.RuntimeArgumentHandle' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.SByte.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.SByte.TryParse(System.ReadOnlySpan<System.Char>, System.SByte)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.Single)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Single.TryParse(System.ReadOnlySpan<System.Char>, System.Single)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Span<T>' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String..ctor(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.String.op_Implicit(System.String)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.Parse(System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.ParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParse(System.ReadOnlySpan<System.Char>, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.ReadOnlySpan<System.Char>, System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.Globalization.TimeSpanStyles, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.TimeSpan.TryParseExact(System.ReadOnlySpan<System.Char>, System.String[], System.IFormatProvider, System.TimeSpan)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TimeZoneInfo.TransitionTime' is marked as readonly in the contract so it must also be marked readonly in the implementation.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Reflection.CallingConventions, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.GetMethod(System.String, System.Int32, System.Reflection.BindingFlags, System.Reflection.Binder, System.Type[], System.Reflection.ParameterModifier[])' does not exist in the implementation but it does exist in the contract.
@@ -22,6 +117,22 @@ MembersMustExist : Member 'System.Type.IsTypeDefinition.get()' does not exist in
 MembersMustExist : Member 'System.Type.IsVariableBoundArray.get()' does not exist in the implementation but it does exist in the contract.
 MembersMustExist : Member 'System.Type.MakeGenericMethodParameter(System.Int32)' does not exist in the implementation but it does exist in the contract.
 TypeCannotChangeClassification : Type 'System.TypedReference' is a 'struct' in the implementation but is a 'ref struct' in the contract.
+MembersMustExist : Member 'System.UInt16.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt16.TryParse(System.ReadOnlySpan<System.Char>, System.UInt16)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt32.TryParse(System.ReadOnlySpan<System.Char>, System.UInt32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.Parse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryFormat(System.Span<System.Char>, System.Int32, System.ReadOnlySpan<System.Char>, System.IFormatProvider)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.Globalization.NumberStyles, System.IFormatProvider, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.UInt64.TryParse(System.ReadOnlySpan<System.Char>, System.UInt64)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.Parse(System.ReadOnlySpan<System.Char>)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryFormat(System.Span<System.Char>, System.Int32, System.Int32)' does not exist in the implementation but it does exist in the contract.
+MembersMustExist : Member 'System.Version.TryParse(System.ReadOnlySpan<System.Char>, System.Version)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.ArrayPool<T>' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.BuffersExtensions' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Buffers.IBufferWriter<T>' does not exist in the implementation but it does exist in the contract.
@@ -248,4 +359,4 @@ MembersMustExist : Member 'System.Xml.Linq.XProcessingInstruction.WriteToAsync(S
 MembersMustExist : Member 'System.Xml.Linq.XText.WriteToAsync(System.Xml.XmlWriter, System.Threading.CancellationToken)' does not exist in the implementation but it does exist in the contract.
 TypesMustExist : Type 'System.Xml.Serialization.SchemaImporter' does not exist in the implementation but it does exist in the contract.
 CannotRemoveBaseTypeOrInterface : Type 'System.Xml.Serialization.XmlSchemaImporter' does not inherit from base type 'System.Xml.Serialization.SchemaImporter' in the implementation but it does in the contract.
-Total Issues: 249
+Total Issues: 360