public IHttpActionResult Delete(int id)
        {
            bool check = BS_CUS_HRM_STAFF_NhanSu_LLKH.check_CUS_HRM_STAFF_NhanSu_LLKH_Exists(db, id);

            if (!check)
            {
                return(NotFound());
            }

            bool result = BS_CUS_HRM_STAFF_NhanSu_LLKH.delete_CUS_HRM_STAFF_NhanSu_LLKH(db, id, Username);

            if (result)
            {
                return(StatusCode(HttpStatusCode.NoContent));
            }
            return(Conflict());
        }