Imported Upstream version 3.6.0

Former-commit-id: da6be194a6b1221998fc28233f2503bd61dd9d14

mcs/class/System.Core/System.IO.Pipes/PipeInterfaces.cs

@@ -0,0 +1,36 @@
+using Microsoft.Win32.SafeHandles;
+
+namespace System.IO.Pipes
+{
+	// Common interfaces
+
+	interface IPipe
+	{
+		SafePipeHandle Handle { get; }
+		void WaitForPipeDrain ();
+	}
+
+	interface IAnonymousPipeClient : IPipe
+	{
+	}
+
+	interface IAnonymousPipeServer : IPipe
+	{
+		SafePipeHandle ClientHandle { get; }
+		void DisposeLocalCopyOfClientHandle ();
+	}
+
+	interface INamedPipeClient : IPipe
+	{
+		void Connect ();
+		void Connect (int timeout);
+		int NumberOfServerInstances { get; }
+		bool IsAsync { get; }
+	}
+
+	interface INamedPipeServer : IPipe
+	{
+		void Disconnect ();
+		void WaitForConnection ();
+	}
+}