Failed unit test on the non-en-us environment.

[kekyo]

Cause failure at the RuntimeSystems/ExceptionThrownByCLI tests.

        public static bool NullReference(object v)
        {
            try
            {
                var r = v.ToString();
            }
            catch (NullReferenceException ex)
            {
                // vvv The message strings different because internationalization strings on the .NET CLR.
                return ex.Message == "Object reference not set to an instance of an object.";
            }
            return false;
        }

[kekyo]

Manually tested on the VS2017 Japanese version.