1 files changed, 30 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Runtime/InteropServices/ICustomMarshaler.cs b/src/mscorlib/src/System/Runtime/InteropServices/ICustomMarshaler.cs
new file mode 100644
index 0000000000..e02db98bb3
--- /dev/null
+++ b/src/mscorlib/src/System/Runtime/InteropServices/ICustomMarshaler.cs
@@ -0,0 +1,30 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+/*=============================================================================
+**
+**
+**
+** Purpose: This the base interface that must be implemented by all custom
+**          marshalers.
+**
+**
+=============================================================================*/
+
+namespace System.Runtime.InteropServices {
+    using System;
+
+[System.Runtime.InteropServices.ComVisible(true)]
+    public interface ICustomMarshaler
+    {        
+        Object MarshalNativeToManaged( IntPtr pNativeData );
+
+        IntPtr MarshalManagedToNative( Object ManagedObj );
+
+        void CleanUpNativeData( IntPtr pNativeData );
+
+        void CleanUpManagedData( Object ManagedObj );
+
+        int GetNativeDataSize();
+    }
+}