Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/mscorlib/system/threading/iobjecthandle.cs

@@ -0,0 +1,33 @@
+// ==++==
+// 
+//   Copyright (c) Microsoft Corporation.  All rights reserved.
+// 
+// ==--==
+/*============================================================
+**
+** Class:  IObjectHandle
+**
+**
+** IObjectHandle defines the interface for unwrapping objects.
+** Objects that are marshal by value object can be returned through 
+** an indirection allowing the caller to control when the
+** object is loaded into their domain. The caller can unwrap
+** the object from the indirection through this interface.
+**
+** 
+===========================================================*/
+namespace System.Runtime.Remoting {
+
+    using System;
+    using System.Runtime.InteropServices;
+
+    [ InterfaceTypeAttribute(ComInterfaceType.InterfaceIsIUnknown),
+      GuidAttribute("C460E2B4-E199-412a-8456-84DC3E4838C3") ]
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public interface IObjectHandle {
+        // Unwrap the object. Implementers of this interface
+        // typically have an indirect referece to another object.
+        Object Unwrap();
+    }
+}
+