Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web.Extensions/ui/IExtenderControl.cs

@@ -0,0 +1,21 @@
+//------------------------------------------------------------------------------
+// <copyright file="IExtenderControl.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+ 
+namespace System.Web.UI {
+    using System;
+    using System.Collections.Generic;
+    using System.Diagnostics.CodeAnalysis;
+    using System.Web;
+    using System.Web.UI;
+
+    public interface IExtenderControl {
+        IEnumerable<ScriptDescriptor> GetScriptDescriptors(Control targetControl);
+
+        [SuppressMessage("Microsoft.Design", "CA1024:UsePropertiesWhereAppropriate",
+            Justification = "Implementation will likely return a new collection, which is too slow for a property")]
+        IEnumerable<ScriptReference> GetScriptReferences();
+    }
+}