public IActionResult Detail(int?id)
 {
     if (id == null)
     {
         return(RedirectToAction("Index"));
     }
     return(View(_services.GetKhachHang(id.Value)));
 }
 public IActionResult SuaKhachHang(int id)
 {
     ViewBag.SuaKhachHang = _khachHangServices.GetKhachHang(id);
     return(View());
 }