partial void DeleteLichSuNguoiDung(LichSuNguoiDung instance);
 partial void InsertLichSuNguoiDung(LichSuNguoiDung instance);
 partial void UpdateLichSuNguoiDung(LichSuNguoiDung instance);
		private void detach_LichSuNguoiDungs(LichSuNguoiDung entity)
		{
			this.SendPropertyChanging();
			entity.NguoiDung = null;
		}