public static List <NguoiDung> GetAllNguoiDung() { List <NguoiDung> list = new List <NguoiDung>(); EntityCollection entityCollection = ManageBase.SelectAllNguoiDung(); using (IEnumerator <EntityBase2> enumerator = entityCollection.GetEnumerator()) { while (enumerator.MoveNext()) { NguoiDungEntity nguoiDungEntity = (NguoiDungEntity)enumerator.Current; NguoiDung nguoiDung = new NguoiDung(); nguoiDung.NguoiDungId = nguoiDungEntity.NguoiDungId; nguoiDung.TenNguoiDung = nguoiDungEntity.HoTenNguoiDung; bool flag = string.IsNullOrEmpty(nguoiDung.TenNguoiDung); if (flag) { nguoiDung.TenNguoiDung = nguoiDungEntity.TenDangNhap; } list.Add(nguoiDung); } } return(list); }