System.BadImageFormatException.SetMessageField C# (CSharp) Method

        private void SetMessageField()
        {
            if (_message == null) {
                if ((_fileName == null) &&
                    (HResult == System.__HResults.COR_E_EXCEPTION))
                    _message = Environment.GetResourceString("Arg_BadImageFormatException");

                else
                    _message = FileLoadException.FormatFileLoadExceptionMessage(_fileName, HResult);
            }
        }