Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/UI/WebControls/Adapters/HideDisabledControlAdapter.cs

@@ -0,0 +1,25 @@
+//------------------------------------------------------------------------------
+// <copyright file="HideDisabledControlAdapter.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI.WebControls.Adapters {
+
+    using System;
+    using System.Web;
+    using System.Web.UI;
+    using System.Web.UI.Adapters;
+
+    // Used for controls which use their default rendering, but are hidden when disabled.
+    public class HideDisabledControlAdapter : WebControlAdapter {
+        // Returns without doing anything if the control is disabled, otherwise, uses the default rendering.
+        protected internal override void Render(HtmlTextWriter writer) {
+            if (Control.Enabled == false) {
+                return;
+            }
+            Control.Render(writer);
+        }
+
+    }
+}