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diff --git a/src/mscorlib/src/System/InsufficientMemoryException.cs b/src/mscorlib/src/System/InsufficientMemoryException.cs
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index 0000000000..64ea0ab8db
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+++ b/src/mscorlib/src/System/InsufficientMemoryException.cs
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+// Copyright (c) Microsoft. All rights reserved.
+// Licensed under the MIT license. See LICENSE file in the project root for full license information.
+
+/*=============================================================================
+**
+**
+**
+** Purpose: The exception class for running out of memory
+** but most likely in a non-fatal way that shouldn't 
+** be affected by escalation policy.  Use this for cases
+** like MemoryFailPoint or a TryAllocate method, where you 
+** expect OOM's with no shared state corruption and you
+** want to recover from these errors.
+**
+**
+=============================================================================*/
+
+namespace System {
+    
+    using System;
+    using System.Runtime.Serialization;
+
+    [Serializable]
+    public sealed class InsufficientMemoryException : OutOfMemoryException
+    {
+        public InsufficientMemoryException() 
+            : base(GetMessageFromNativeResources(ExceptionMessageKind.OutOfMemory)) {
+            SetErrorCode(__HResults.COR_E_INSUFFICIENTMEMORY);
+        }
+    
+        public InsufficientMemoryException(String message) 
+            : base(message) {
+            SetErrorCode(__HResults.COR_E_INSUFFICIENTMEMORY);
+        }
+        
+        public InsufficientMemoryException(String message, Exception innerException) 
+            : base(message, innerException) {
+            SetErrorCode(__HResults.COR_E_INSUFFICIENTMEMORY);
+        }
+
+        private InsufficientMemoryException(SerializationInfo info, StreamingContext context) : base(info, context) {
+        }
+    }
+}