Try runtime-async

Author: tom-englert

AssemblyToProcess/AssemblyToProcess.csproj

@@ -1,13 +1,14 @@
 <?xml version="1.0" encoding="utf-8"?>
 <Project Sdk="Microsoft.NET.Sdk">
   <PropertyGroup>
-    <TargetFrameworks>net472;net11.0</TargetFrameworks>
+    <TargetFrameworks>net472;net10.0;net11.0</TargetFrameworks>
     <DisableFody>true</DisableFody>
     <Nullable>enable</Nullable>
   </PropertyGroup>
-  <PropertyGroup>
+  <PropertyGroup Condition="'$(TargetFramework)'=='net11.0'">
     <EnablePreviewFeatures>true</EnablePreviewFeatures>
     <Features>$(Features);runtime-async=on</Features>
+    <DefineConstants>$(DefineConstants);NET11_0</DefineConstants>
   </PropertyGroup>
   <ItemGroup>
     <Using Remove="System.Net.Http" />

AssemblyToProcess/CatchAndFinally.cs

@@ -76,7 +76,7 @@ public async Task Finally3()
         }
     }
 
-#if NETCOREAPP2_0
+#if NET
         public async Task Catch1_WithValueTask()
         {
             try

AssemblyToProcess/ClassWithAttribute.cs

@@ -28,7 +28,7 @@ public async Task<int> AsyncGenericMethodWithReturn(SynchronizationContext conte
         return await Task.Run(() => 10);
     }
 
-#if NETCOREAPP2_0
+#if NET
     public async Task AsyncMethod_WithValueTask(SynchronizationContext context)
     {
         SynchronizationContext.SetSynchronizationContext(context);

AssemblyToProcess/DoNotWeave.cs

@@ -28,7 +28,7 @@ public async Task<int> AsyncGenericMethodWithReturn(SynchronizationContext conte
         return await Task.Run(() => 10).ConfigureAwait(true);
     }
 
-#if NETCOREAPP2_0
+#if NET
     public async Task AsyncMethod_WithValueTask(SynchronizationContext context)
     {
         SynchronizationContext.SetSynchronizationContext(context);

AssemblyToProcess/Example.cs

@@ -2,6 +2,13 @@
 
 public class Example
 {
+#if NET
+    public async Task Test()
+    {
+        await new ValueTask(Task.Delay(1)).ConfigureAwait(false);
+    }
+#endif
+
     public async Task AsyncMethod1()
     {
         await Task.Delay(1);
@@ -93,7 +100,7 @@ public async Task<Example> AsyncMethod12()
         return result;
     }
 
-#if NETCOREAPP2_0
+#if NET
     public async Task AsyncMethod1_WithValueTask()
     {
         await new ValueTask(Task.Delay(1));

AssemblyToProcess/FlagSynchronizationContext.cs

@@ -1,5 +1,4 @@
-public class FlagSynchronizationContext :
-    SynchronizationContext
+public class FlagSynchronizationContext : SynchronizationContext
 {
     public bool Flag { get; set; }
 

AssemblyToProcess/GenericIssue.cs

@@ -9,7 +9,7 @@ public async Task Method(Task<TItem> itemTask)
         var item = await itemTask;
     }
 
-#if NETCOREAPP2_0
+#if NET
     [ConfigureAwait(false)]
     public async Task Method_WithValueTask(Task<TItem> itemTask)
     {
@@ -26,7 +26,7 @@ public async Task Method<TItem>(Task<TItem> itemTask)
         var item = await itemTask;
     }
 
-#if NETCOREAPP2_0
+#if NET
     [ConfigureAwait(false)]
     public async Task Method_WithValueTask<TItem>(Task<TItem> itemTask)
     {

AssemblyToProcess/Issue1.cs

@@ -11,11 +11,11 @@ async Task WithReaderAndWriter(TextWriter writer, StreamReader reader)
         }
     }
 
-#if NETCOREAPP2_0
+#if NET
     [ConfigureAwait(false)]
     async Task WithReaderAndWriter_WithValueTask(TextWriter writer, StreamReader reader)
     {
-        while (await new ValueTask<string>(reader.ReadLineAsync()) is { } line)
+        while (await new ValueTask<string?>(reader.ReadLineAsync()) is { } line)
         {
             await new ValueTask(writer.WriteLineAsync(line));
         }

AssemblyToProcess/MethodWithAttribute.cs

@@ -9,7 +9,7 @@ public async Task AsyncMethod(SynchronizationContext context)
         await Task.Delay(0);
     }
 
-#if NETCOREAPP2_0
+#if NET
     [ConfigureAwait(false)]
     public async Task AsyncMethod_WithValueTask(SynchronizationContext context)
     {

AssemblyToProcess/MethodWithUsing.cs

@@ -14,7 +14,7 @@ static async Task<IDisposable> NewMethod()
         return new MyDisposable();
     }
 
-#if NETCOREAPP2_0
+#if NET
     [ConfigureAwait(false)]
     public async Task AsyncMethod_WithValueTask()
     {