Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.Web/UI/PageAsyncTaskTap.cs

@@ -0,0 +1,27 @@
+//------------------------------------------------------------------------------
+// <copyright file="PageAsyncTaskTap.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+//------------------------------------------------------------------------------
+
+namespace System.Web.UI {
+    using System;
+    using System.Threading;
+    using System.Threading.Tasks;
+
+    // Represents an IPageAsyncTask that follows TAP (Task-returning Async method)
+
+    internal sealed class PageAsyncTaskTap : IPageAsyncTask {
+
+        private readonly Func<CancellationToken, Task> _handler;
+
+        public PageAsyncTaskTap(Func<CancellationToken, Task> handler) {
+            _handler = handler;
+        }
+
+        public Task ExecuteAsync(object sender, EventArgs e, CancellationToken cancellationToken) {
+            return _handler(cancellationToken);
+        }
+
+    }
+}