Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Data.Entity/System/Data/Objects/Internal/IEntityKeyStrategy.cs

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+//---------------------------------------------------------------------
+// <copyright file="IEntityKeyStrategy.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//---------------------------------------------------------------------
+using System;
+using System.Collections.Generic;
+using System.Text;
+using System.Data.Objects.DataClasses;
+
+namespace System.Data.Objects.Internal
+{
+    /// <summary>
+    /// A strategy interface that defines methods used for setting and getting EntityKey values on an entity.
+    /// Implementors of this interface are used by the EntityWrapper class.
+    /// </summary>
+    internal interface IEntityKeyStrategy
+    {
+        /// <summary>
+        /// Gets the entity key.
+        /// </summary>
+        /// <returns>The key</returns>
+        EntityKey GetEntityKey();
+
+        /// <summary>
+        /// Sets the entity key
+        /// </summary>
+        /// <param name="key">The key</param>
+        void SetEntityKey(EntityKey key);
+
+        /// <summary>
+        /// Returns the entity key directly from the entity
+        /// </summary>
+        /// <returns>the key</returns>
+        EntityKey GetEntityKeyFromEntity();
+    }
+}