private void detach_TuDiens(TuDien entity)
		{
			this.SendPropertyChanging();
			entity.NguoiDung = null;
		}
		private void attach_TuDiens(TuDien entity)
		{
			this.SendPropertyChanging();
			entity.NguoiDung = this;
		}
 partial void UpdateTuDien(TuDien instance);
 partial void DeleteTuDien(TuDien instance);
 partial void InsertTuDien(TuDien instance);