Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

mcs/class/referencesource/System.ServiceModel/System/ServiceModel/HostnameComparisonMode.cs

@@ -0,0 +1,34 @@
+//----------------------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//----------------------------------------------------------------------------
+namespace System.ServiceModel
+{
+    using System.ComponentModel;
+
+    public enum HostNameComparisonMode
+    {
+        StrongWildcard = 0, // +
+        Exact = 1,
+        WeakWildcard = 2,   // *
+    }
+
+    static class HostNameComparisonModeHelper
+    {
+        internal static bool IsDefined(HostNameComparisonMode value)
+        {
+            return
+                value == HostNameComparisonMode.StrongWildcard
+                || value == HostNameComparisonMode.Exact
+                || value == HostNameComparisonMode.WeakWildcard;
+        }
+
+        public static void Validate(HostNameComparisonMode value)
+        {
+            if (!IsDefined(value))
+            {
+                throw DiagnosticUtility.ExceptionUtility.ThrowHelperError(new InvalidEnumArgumentException("value", (int)value,
+                    typeof(HostNameComparisonMode)));
+            }
+        }
+    }
+}