public ActionResult Update(int id)
        {
            var model = _repository.Get(id);

            if (model != null)
            {
                return(View(model));
            }
            else
            {
                return(RedirectToAction("PageNotFound", "Error"));
            }
        }
        public ActionResult PayOff(int id)
        {
            if (_repository.Get(id) != null)
            {
                if (_repository.PayOff(id))
                {
                }

                return(RedirectToAction("Detail", new { id }));
            }
            else
            {
                return(RedirectToAction("PageNotFound", "Error"));
            }
        }