Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Metadata/Edm/OperationAction.cs

@@ -0,0 +1,35 @@
+//---------------------------------------------------------------------
+// <copyright file="OperationAction.cs" company="Microsoft">
+//      Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//
+// @owner       jeffreed
+// @backupOwner leil
+//---------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Text;
+
+namespace System.Data.Metadata.Edm
+{
+    /// <summary>
+    /// Represents the list of possible actions for delete operation
+    /// </summary>
+    public enum OperationAction
+    {
+        /// <summary>
+        /// no action
+        /// </summary>
+        None,
+
+        /// <summary>
+        /// Cascade to other ends
+        /// </summary>
+        Cascade,
+
+        /// <summary>
+        /// Do not allow if other ends are not empty 
+        /// </summary>
+        Restrict,
+    }
+}