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..83f6ffebab9 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
@@ -99,6 +99,11 @@ internal XmlSchemaException(string res, string[] args, Exception innerException,
 
         internal static string CreateMessage(string res, string[] args)
         {
+            if (args == null)
+            {
+                return res;
+            }
+
             try
             {
                 return string.Format(res, args);