1 files changed, 33 insertions, 0 deletions
diff --git a/src/mscorlib/shared/System/Collections/Generic/KeyNotFoundException.cs b/src/mscorlib/shared/System/Collections/Generic/KeyNotFoundException.cs
new file mode 100644
index 0000000000..1fca7732ae
--- /dev/null
+++ b/src/mscorlib/shared/System/Collections/Generic/KeyNotFoundException.cs
@@ -0,0 +1,33 @@
+// 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.
+
+using System;
+using System.Runtime.Serialization;
+
+namespace System.Collections.Generic
+{
+    [Serializable]
+    public class KeyNotFoundException : SystemException
+    {
+        public KeyNotFoundException()
+            : base(SR.Arg_KeyNotFound)
+        {
+            HResult = __HResults.COR_E_KEYNOTFOUND;
+        }
+
+        public KeyNotFoundException(String message)
+            : base(message)
+        {
+            HResult = __HResults.COR_E_KEYNOTFOUND;
+        }
+
+        public KeyNotFoundException(String message, Exception innerException)
+            : base(message, innerException)
+        {
+            HResult = __HResults.COR_E_KEYNOTFOUND;
+        }
+
+        protected KeyNotFoundException(SerializationInfo info, StreamingContext context) : base(info, context) { }
+    }
+}