public bool AddOpinion(ref Opinion addOpinion)
        {
            using(ResidentialPropertyMSEntities rpms=new ResidentialPropertyMSEntities())
            {
                try
                {
                    rpms.AddToOpinions(addOpinion);
                    rpms.SaveChanges();
                }
                catch (Exception)
                {
                    return false;
                }

                return true;
            }
        }

public bool InsertOrder(OrderPri insertOrderPri,List<OrderDetail> insertOrderDetail)
        {
            try
            {
                smse = new SuperMarketSystemEntities();
                smse.AddToOrderPris(insertOrderPri);
                foreach (var q in insertOrderDetail)
                {
                    q.OrderPriID = insertOrderPri.OrderPriID;
                    smse.AddToOrderDetails(q);
                }
                smse.SaveChanges();
                return true;
            }
            catch
            {
                return false;
            }
        }