public BindingList <NguoiDungDTO> LayDanhSach() { // Kiem tra Business Rule neu co BindingList <NguoiDungDTO> danhSach = new BindingList <NguoiDungDTO>(); NguoiDungDAO itemDAO = new NguoiDungDAO(); danhSach = itemDAO.LayDanhSach(); return(danhSach); }