added the readwritetimeout property to the context

src/Microsoft.OData.Client/DataServiceContext.cs

@@ -115,6 +115,9 @@ public class DataServiceContext
 #if !PORTABLELIB // Timeout not available
         /// <summary>time-out value in seconds, 0 for default</summary>
         private int timeout;
+
+        /// <summary>read or write time-out value in seconds, 0 for default</summary>
+        private int readWriteTimeout;
 #endif
         /// <summary>whether to use post-tunneling for PUT/DELETE</summary>
         private bool postTunneling;
@@ -507,6 +510,33 @@ public virtual int Timeout
                 this.timeout = value;
             }
         }
+
+        /// <summary>Gets or sets the readwrite time-out option (in seconds) that is used for the underlying HTTP request to the data service.</summary>
+        /// <returns>An integer that indicates the time interval (in seconds) before readwritetime-out of a service request.</returns>
+        /// <remarks>
+        /// A value of 0 will use the default readwritetimeout of the underlying HTTP request.
+        /// This value must be set before executing any query or update operations against
+        /// the target data service for it to have effect on the on the request.
+        /// The value may be changed between requests to a data service and the new value
+        /// will be picked up by the next data service request.
+        /// </remarks>
+        public virtual int ReadWriteTimeout
+        {
+            get
+            {
+                return this.readWriteTimeout;
+            }
+
+            set
+            {
+                if (value < 0)
+                {
+                    throw Error.ArgumentOutOfRange("ReadWriteTimeout");
+                }
+
+                this.readWriteTimeout = value;
+            }
+        }
 #endif
 
         /// <summary>Gets or sets a Boolean value that indicates whether to use post tunneling.</summary>

src/Microsoft.OData.Client/ODataRequestMessageWrapper.cs

@@ -161,8 +161,12 @@ internal static ODataRequestMessageWrapper CreateRequestMessageWrapper(BuildingR
             if (requestInfo.Timeout != 0)
             {
                 requestMessage.Timeout = requestInfo.Timeout;
-                //set readwritetimeout value as the set timeout value
-                requestMessage.ReadWriteTimeout = requestInfo.Timeout;
+
+            }
+
+            if (requestInfo.ReadWriteTimeout != 0)
+            {
+                requestMessage.ReadWriteTimeout = requestInfo.ReadWriteTimeout;
             }
 #endif
 

src/Microsoft.OData.Client/RequestInfo.cs

@@ -156,6 +156,15 @@ internal int Timeout
         {
             get { return this.Context.Timeout; }
         }
+
+        /// <summary>
+        /// Get the read or write timeout span in seconds to use for the underlying HTTP request to the data service.
+        /// </summary>
+        internal int ReadWriteTimeout
+        {
+            get { return this.Context.ReadWriteTimeout; }
+        }
+
 #endif
 
         /// <summary>