1 files changed, 34 insertions, 0 deletions
diff --git a/src/mscorlib/src/System/Threading/LockRecursionException.cs b/src/mscorlib/src/System/Threading/LockRecursionException.cs
new file mode 100644
index 0000000000..c5e3146cbc
--- /dev/null
+++ b/src/mscorlib/src/System/Threading/LockRecursionException.cs
@@ -0,0 +1,34 @@
+// Licensed to the .NET Foundation under one or more agreements.
+// The .NET Foundation licenses this file to you under the MIT license.
+// See the LICENSE file in the project root for more information.
+
+/*============================================================
+//
+//
+//
+// Purpose: 
+// This exception represents a failed attempt to recursively
+// acquire a lock, because the particular lock kind doesn't
+// support it in its current state.
+============================================================*/
+
+namespace System.Threading
+{
+    using System;
+    using System.Runtime.Serialization;
+    using System.Runtime.CompilerServices;
+
+    [Serializable]
+    [System.Security.Permissions.HostProtection(MayLeakOnAbort = true)]
+#if !FEATURE_CORECLR
+    [TypeForwardedFrom("System.Core, Version=3.5.0.0, Culture=Neutral, PublicKeyToken=b77a5c561934e089")]
+#endif
+    public class LockRecursionException : System.Exception
+    {
+        public LockRecursionException() { }
+        public LockRecursionException(string message) : base(message) { }
+        protected LockRecursionException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+        public LockRecursionException(string message, Exception innerException) : base(message, innerException) { }
+    }
+
+}