Imported Upstream version 5.18.0.142

Former-commit-id: 7467d4b717762eeaf652d77f1486dd11ffb1ff1f

mcs/class/System.Core/System.IO.Pipes/AnonymousPipeServerStream.NotSupported.cs

@@ -0,0 +1,28 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+using Microsoft.Win32.SafeHandles;
+using System.Diagnostics;
+using System.Security;
+
+namespace System.IO.Pipes
+{
+	/// <summary>
+	/// Anonymous pipe server stream
+	/// </summary>
+	public sealed partial class AnonymousPipeServerStream : PipeStream
+	{
+		public AnonymousPipeServerStream (PipeDirection direction, HandleInheritability inheritability, int bufferSize, PipeSecurity pipeSecurity)
+			: base (PipeDirection.In, 0)
+		{
+			throw new PlatformNotSupportedException();
+		}
+
+		// Creates the anonymous pipe.
+		private unsafe void Create (PipeDirection direction, HandleInheritability inheritability, int bufferSize)
+		{
+			throw new PlatformNotSupportedException();
+		}
+	}
+}