Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebParts/IVersioningPersonalizable.cs

@@ -0,0 +1,26 @@
+//------------------------------------------------------------------------------
+// <copyright file="IVersioningPersonalizable.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.WebParts {
+
+    using System;
+    using System.Collections;
+
+    /// <devdoc>
+    /// Allows an object to load up personalization state that would
+    /// otherwise be discarded as a result of loading property values
+    /// that have been removed in a newer version of the object's
+    /// implementation.
+    /// </devdoc>
+    public interface IVersioningPersonalizable {
+
+        /// <devdoc>
+        /// The specified dictionary contains property values that
+        /// could not automatically be loaded into the object.
+        /// </devdoc>
+        void Load(IDictionary unknownProperties);
+    }
+}