Imported Upstream version 4.0.0~alpha1

Former-commit-id: 806294f5ded97629b74c85c09952f2a74fe182d9

external/referencesource/System.ServiceModel/System/ServiceModel/Channels/UriHelper.cs

@@ -0,0 +1,19 @@
+// <copyright>
+//     Copyright (c) Microsoft Corporation.  All rights reserved.
+// </copyright>
+
+namespace System.ServiceModel.Channels
+{
+    internal static class UriHelper
+    {
+        internal static string NormalizedHost(this Uri uri)
+        {
+            return uri.GetComponents(UriComponents.NormalizedHost, UriFormat.UriEscaped);
+        }
+
+        internal static string NormalizedAbsoluteUri(this Uri uri)
+        {
+            return uri.GetComponents(UriComponents.AbsoluteUri | UriComponents.NormalizedHost, UriFormat.UriEscaped);
+        }
+    }
+}