Imported Upstream version 4.6.0.125

Former-commit-id: a2155e9bd80020e49e72e86c44da02a8ac0e57a4

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

@@ -0,0 +1,41 @@
+//------------------------------------------------------------
+// Copyright (c) Microsoft Corporation.  All rights reserved.
+//------------------------------------------------------------
+namespace System.ServiceModel
+{
+    public enum SecurityMode
+    {
+        None,
+        Transport,
+        Message,
+        TransportWithMessageCredential
+    }
+
+    static class SecurityModeHelper
+    {
+        internal static bool IsDefined(SecurityMode value)
+        {
+            return (value == SecurityMode.None ||
+                value == SecurityMode.Transport ||
+                value == SecurityMode.Message ||
+                value == SecurityMode.TransportWithMessageCredential);
+        }
+
+        internal static SecurityMode ToSecurityMode(UnifiedSecurityMode value)
+        {
+            switch (value)
+            {
+                case UnifiedSecurityMode.None:
+                    return SecurityMode.None;
+                case UnifiedSecurityMode.Transport:
+                    return SecurityMode.Transport;
+                case UnifiedSecurityMode.Message:
+                    return SecurityMode.Message;
+                case UnifiedSecurityMode.TransportWithMessageCredential:
+                    return SecurityMode.TransportWithMessageCredential;
+                default:
+                    return (SecurityMode)value;
+            }
+        }
+    }
+}