Add RequiresPreviewFeatures to non-stable API

samples/ThirdPartyControlsSample/ThirdPartyControlsSample.csproj

@@ -7,6 +7,7 @@
 		<UseMaui>true</UseMaui>
 		<SingleProject>true</SingleProject>
 		<ImplicitUsings>enable</ImplicitUsings>
+		<EnablePreviewFeatures>true</EnablePreviewFeatures>
 
 		<!-- Display name -->
 		<ApplicationTitle>ThirdPartyControlsSample</ApplicationTitle>

src/.editorconfig

@@ -0,0 +1,4 @@
+[*.cs]
+
+# CA2252: This API requires opting into preview features
+dotnet_diagnostic.CA2252.severity = none

src/BlazorBindings.Maui/AttachedPropertyRegistry.cs

@@ -4,12 +4,12 @@
 using Microsoft.Maui.Controls;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 
 namespace BlazorBindings.Maui
 {
     /// <remarks>Experimental API, subject to change.</remarks>
-    [EditorBrowsable(EditorBrowsableState.Never)]
+    [RequiresPreviewFeatures]
     public static class AttachedPropertyRegistry
     {
         internal static readonly Dictionary<string, Action<BindableObject, object>> AttachedPropertyHandlers = new();

src/BlazorBindings.Maui/Elements/AttributeHelper.Common.cs

@@ -4,14 +4,14 @@
 using System;
 using System.Collections;
 using System.Collections.Generic;
-using System.ComponentModel;
 using System.Globalization;
 using System.Linq;
 using System.Runtime.CompilerServices;
+using System.Runtime.Versioning;
 
 namespace BlazorBindings.Maui.Elements
 {
-    [EditorBrowsable(EditorBrowsableState.Never)]
+    [RequiresPreviewFeatures]
     public static partial class AttributeHelper
     {
         public static bool GetBool(object value, bool defaultValueIfNull = default)

src/BlazorBindings.Maui/Elements/BindableObject.cs

@@ -5,7 +5,7 @@
 using Microsoft.AspNetCore.Components;
 using Microsoft.AspNetCore.Components.Rendering;
 using System;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 using System.Threading.Tasks;
 using MC = Microsoft.Maui.Controls;
 
@@ -51,7 +51,7 @@ protected override void RenderAdditionalElementContent(RenderTreeBuilder builder
             RenderAdditionalPartialElementContent(builder, ref sequence);
         }
 
-        [EditorBrowsable(EditorBrowsableState.Never)]
+        [RequiresPreviewFeatures]
         protected virtual void RenderAdditionalPartialElementContent(RenderTreeBuilder builder, ref int sequence) { }
 
         protected virtual bool HandleAdditionalParameter(string name, object value) => false;

src/BlazorBindings.Maui/Elements/Handlers/BaseAttachedPropertiesHandler.cs

@@ -2,13 +2,13 @@
 // Licensed under the MIT license.
 
 using BlazorBindings.Core;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 using MC = Microsoft.Maui.Controls;
 
 namespace BlazorBindings.Maui.Elements.Handlers
 {
     /// <remarks>Experimental API, subject to change.</remarks>
-    [EditorBrowsable(EditorBrowsableState.Never)]
+    [RequiresPreviewFeatures]
     public abstract class BaseAttachedPropertiesHandler : IMauiElementHandler, INonPhysicalChild
     {
         /// <summary>

src/BlazorBindings.Maui/Elements/Handlers/RootContainerHandler.cs

@@ -4,7 +4,7 @@
 using BlazorBindings.Core;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 using System.Threading.Tasks;
 using MC = Microsoft.Maui.Controls;
 
@@ -15,7 +15,7 @@ namespace BlazorBindings.Maui.Elements.Handlers
     /// from a Blazor component.
     /// </summary>
     /// <remarks>Experimental API, subject to change.</remarks>
-    [EditorBrowsable(EditorBrowsableState.Never)]
+    [RequiresPreviewFeatures]
     public class RootContainerHandler : IMauiContainerElementHandler, INonChildContainerElement
     {
         private TaskCompletionSource<MC.BindableObject> _taskCompletionSource;

src/BlazorBindings.Maui/Navigation/Navigation.cs

@@ -4,7 +4,7 @@
 using Microsoft.Maui.Controls;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 using System.Threading.Tasks;
 using IComponent = Microsoft.AspNetCore.Components.IComponent;
 using MC = Microsoft.Maui.Controls;
@@ -82,18 +82,9 @@ public async Task PopToRootAsync(bool animated = true)
         /// This method is exposed for extensibility purposes, and shouldn't be used directly.
         /// </summary>
         /// <remarks>Experimental API, subject to change.</remarks>
-        [EditorBrowsable(EditorBrowsableState.Never)]
+        [RequiresPreviewFeatures]
         public async Task<T> BuildElement<T>(Type componentType, Dictionary<string, object> arguments) where T : Element
         {
-            if (_wrapperComponentType != null)
-            {
-                arguments = new()
-                {
-                    ["ChildContent"] = RenderFragments.FromComponentType(componentType, arguments)
-                };
-                componentType = _wrapperComponentType;
-            }
-
             var renderer = _services.GetRequiredService<MauiBlazorBindingsRenderer>();
 
             var (bindableObject, componentTask) = await renderer.GetElementFromRenderedComponent(componentType, arguments);

src/BlazorBindings.Maui/RenderTreeBuilderHelper.cs

@@ -7,13 +7,13 @@
 using Microsoft.AspNetCore.Components.Rendering;
 using System;
 using System.Collections.Generic;
-using System.ComponentModel;
+using System.Runtime.Versioning;
 using MC = Microsoft.Maui.Controls;
 
 namespace BlazorBindings.Maui
 {
     /// <remarks>Experimental API, subject to change.</remarks>
-    [EditorBrowsable(EditorBrowsableState.Never)]
+    [RequiresPreviewFeatures]
     public static class RenderTreeBuilderHelper
     {
         public static void AddContentProperty<TControl>(

src/BlazorBindings.UnitTests/BlazorBindings.UnitTests.csproj

@@ -4,6 +4,7 @@
     <TargetFramework>net7.0</TargetFramework>
     <IsPackable>false</IsPackable>
 	<UseMaui>true</UseMaui>
+	<EnablePreviewFeatures>true</EnablePreviewFeatures>
   </PropertyGroup>
 
   <ItemGroup>