partial void DeleteQuanHuyen(QuanHuyen instance);
 partial void InsertQuanHuyen(QuanHuyen instance);
 partial void UpdateQuanHuyen(QuanHuyen instance);
		private void detach_QuanHuyens(QuanHuyen entity)
		{
			this.SendPropertyChanging();
			entity.TinhThanh = null;
		}