// GET: Customers/Details/5
        public ActionResult Details(int?id)
        {
            if (id == null)
            {
                return(new HttpStatusCodeResult(HttpStatusCode.BadRequest));
            }

            var result = customer.GetSingle(x => x.Id == id);

            if (result == null)
            {
                return(HttpNotFound());
            }
            return(View(result));
        }