Add more info in stage description comment

src/libraries/System.Runtime.InteropServices/gen/Microsoft.Interop.SourceGeneration/GeneratedStatements.cs

@@ -184,8 +184,8 @@ private static SyntaxTriviaList GenerateStageTrivia(StubCodeContext.Stage stage)
                 StubCodeContext.Stage.Invoke => "Call the P/Invoke.",
                 StubCodeContext.Stage.UnmarshalCapture => "Capture the native data into marshaller instances in case conversion to managed data throws an exception.",
                 StubCodeContext.Stage.Unmarshal => "Convert native data to managed data.",
-                StubCodeContext.Stage.CleanupCallerAllocated => "Perform required cleanup.",
-                StubCodeContext.Stage.CleanupCalleeAllocated => "Perform required cleanup.",
+                StubCodeContext.Stage.CleanupCallerAllocated => "Perform cleanup of caller allocated resources.",
+                StubCodeContext.Stage.CleanupCalleeAllocated => "Perform cleanup of callee allocated resources.",
                 StubCodeContext.Stage.NotifyForSuccessfulInvoke => "Keep alive any managed objects that need to stay alive across the call.",
                 StubCodeContext.Stage.GuaranteedUnmarshal => "Convert native data to managed data even in the case of an exception during the non-cleanup phases.",
                 _ => throw new ArgumentOutOfRangeException(nameof(stage))

src/libraries/System.Runtime.InteropServices/tests/TestAssets/SharedTypes/ComInterfaces/IDerived.cs

@@ -2,19 +2,18 @@
 // The .NET Foundation licenses this file to you under the MIT license.
 
 using System;
-using System.Collections.Generic;
 using System.Runtime.InteropServices;
 using System.Runtime.InteropServices.Marshalling;
 
 namespace SharedTypes.ComInterfaces
 {
-    [GeneratedComInterface]
+    [GeneratedComInterface(Options = ComInterfaceOptions.ComObjectWrapper)]
     [Guid(_guid)]
     internal partial interface IDerived : IGetAndSetInt
     {
         void SetName([MarshalUsing(typeof(Utf16StringMarshaller))] string name);
 
-        [return:MarshalUsing(typeof(Utf16StringMarshaller))]
+        [return: MarshalUsing(typeof(Utf16StringMarshaller))]
         string GetName();
 
         internal new const string _guid = "7F0DB364-3C04-4487-9193-4BB05DC7B654";