private void detach_TuVungs(TuVung entity)
		{
			this.SendPropertyChanging();
			entity.TuDien = null;
		}
		private void attach_TuVungs(TuVung entity)
		{
			this.SendPropertyChanging();
			entity.TuDien = this;
		}
 partial void UpdateTuVung(TuVung instance);
 partial void DeleteTuVung(TuVung instance);
 partial void InsertTuVung(TuVung instance);