diff --git a/src/dotnet-svcutil/lib/src/FrameworkFork/Microsoft.Xml/Xml/schema/XmlSchemaException.cs b/src/dotnet-svcutil/lib/src/FrameworkFork/Microsoft.Xml/Xml/schema/XmlSchemaException.cs
index b0e20dccf76..3a1ba0a3517 100644
--- a/src/dotnet-svcutil/lib/src/FrameworkFork/Microsoft.Xml/Xml/schema/XmlSchemaException.cs
+++ b/src/dotnet-svcutil/lib/src/FrameworkFork/Microsoft.Xml/Xml/schema/XmlSchemaException.cs
@@ -99,14 +99,12 @@ internal XmlSchemaException(string res, string[] args, Exception innerException,
 
         internal static string CreateMessage(string res, string[] args)
         {
-            try
+            if (args == null)
             {
-                return string.Format(res, args);
-            }
-            catch (MissingManifestResourceException)
-            {
-                return "UNKNOWN(" + res + ")";
+                return res;
             }
+
+            return string.Format(res, args);
         }
 
         internal string GetRes