public static void set_to_file(cef_post_data_element_t *self, cef_string_t *fileName)
        {
            set_to_file_delegate d;
            var p = self->_set_to_file;

            if (p == _p5)
            {
                d = _d5;
            }
            else
            {
                d = (set_to_file_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_to_file_delegate));
                if (_p5 == IntPtr.Zero)
                {
                    _d5 = d; _p5 = p;
                }
            }
            d(self, fileName);
        }
 public static void set_to_file(cef_post_data_element_t* self, cef_string_t* fileName)
 {
     set_to_file_delegate d;
     var p = self->_set_to_file;
     if (p == _p5) { d = _d5; }
     else
     {
         d = (set_to_file_delegate)Marshal.GetDelegateForFunctionPointer(p, typeof(set_to_file_delegate));
         if (_p5 == IntPtr.Zero) { _d5 = d; _p5 = p; }
     }
     d(self, fileName);
 }