partial void Deletecheck_bill_rec_pic(check_bill_rec_pic instance);
 partial void Insertcheck_bill_rec_pic(check_bill_rec_pic instance);
 partial void Updatecheck_bill_rec_pic(check_bill_rec_pic instance);
		private void detach_check_bill_rec_pic(check_bill_rec_pic entity)
		{
			this.SendPropertyChanging();
			entity.check_bill = null;
		}