Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.Web/Util/VersionUtil.cs

@@ -0,0 +1,32 @@
+//------------------------------------------------------------------------------
+// <copyright file="VersionUtil.cs" company="Microsoft">
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>                                                                
+//------------------------------------------------------------------------------
+
+/*
+ * Helper class for performing common operations on Version objects
+ * 
+ * Copyright (c) 2009 Microsoft Corporation
+ */
+
+namespace System.Web.Util {
+    using System;
+
+    internal static class VersionUtil {
+
+        public static readonly Version Framework20 = new Version(2, 0);
+        public static readonly Version Framework35 = new Version(3, 5);
+        public static readonly Version Framework40 = new Version(4, 0);
+        public static readonly Version Framework45 = new Version(4, 5);
+        public static readonly Version Framework451 = new Version(4, 5, 1);
+        public static readonly Version Framework452 = new Version(4, 5, 2);
+
+        // Convenience accessor for the "default" framework version; various configuration
+        // switches can use this as a default value. This value must only be bumped during
+        // SxS releases of the .NET Framework.
+        public static readonly Version FrameworkDefault = Framework40;
+        public const string FrameworkDefaultString = "4.0";
+
+    }
+}