1 files changed, 29 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Collections/IHashCodeProvider.cs b/src/mscorlib/src/System/Collections/IHashCodeProvider.cs
new file mode 100644
index 0000000000..96dbe07f07
--- /dev/null
+++ b/src/mscorlib/src/System/Collections/IHashCodeProvider.cs
@@ -0,0 +1,29 @@
+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+/*============================================================
+**
+** Interface: IHashCodeProvider
+** 
+** 
+**
+**
+** Purpose: A bunch of strings.
+**
+** 
+===========================================================*/
+namespace System.Collections {
+    
+    using System;
+    // Provides a mechanism for a hash table user to override the default
+    // GetHashCode() function on Objects, providing their own hash function.
+    [Obsolete("Please use IEqualityComparer instead.")]
+    [System.Runtime.InteropServices.ComVisible(true)]
+    public interface IHashCodeProvider 
+    {
+        // Interfaces are not serializable
+        // Returns a hash code for the given object.  
+        // 
+        int GetHashCode (Object obj);
+    }
+}