When AnonymousPipeServerStream is created with HandleInheritability.Inheritable, its Dispose method should dispose the client no matter if it was exposed or not.

This is going to allow users who did not call DisposeLocalCopyOfClientHandle to avoid resource leaks.

Author: adamsitnik

src/libraries/System.IO.Pipes/src/System/IO/Pipes/AnonymousPipeServerStream.cs

@@ -1,7 +1,6 @@
 // Licensed to the .NET Foundation under one or more agreements.
 // The .NET Foundation licenses this file to you under the MIT license.
 
-using System.Diagnostics.CodeAnalysis;
 using Microsoft.Win32.SafeHandles;
 
 namespace System.IO.Pipes
@@ -13,6 +12,7 @@ public sealed partial class AnonymousPipeServerStream : PipeStream
     {
         private SafePipeHandle _clientHandle = null!;
         private bool _clientHandleExposed;
+        private readonly HandleInheritability _inheritability;
 
         public AnonymousPipeServerStream()
             : this(PipeDirection.Out, HandleInheritability.None, 0)
@@ -73,6 +73,7 @@ public AnonymousPipeServerStream(PipeDirection direction, HandleInheritability i
             }
 
             Create(direction, inheritability, bufferSize);
+            _inheritability = inheritability;
         }
 
         ~AnonymousPipeServerStream()
@@ -121,10 +122,10 @@ protected override void Dispose(bool disposing)
         {
             try
             {
-                // We should dispose of the client handle if it was not exposed.
-                if (!_clientHandleExposed && _clientHandle != null && !_clientHandle.IsClosed)
+                // We should dispose of the client handle if it was created inheritable or it was not exposed at all.
+                if (_inheritability == HandleInheritability.Inheritable || !_clientHandleExposed)
                 {
-                    _clientHandle.Dispose();
+                    DisposeLocalCopyOfClientHandle();
                 }
             }
             finally