public shop_credit alter_shop_credit()
        {
            try
            {
                shop_credit prev_shop_credit = db.shop_credits.SingleOrDefault(a => a.id == shop_credit.id);

                prev_shop_credit.balance_after  = shop_credit.balance_after;
                prev_shop_credit.balance_before = shop_credit.balance_before;
                prev_shop_credit.credit_type    = shop_credit.credit_type;
                prev_shop_credit.shop           = shop_credit.shop;
                prev_shop_credit.transaction    = shop_credit.shop;


                db.SubmitChanges();
                return(shop_credit);
            }
            catch (Exception)
            {
                return(null);
            }
        }
 public shop_credit_crud(shop_credit shop_credit_)
 {
     this.shop_credit_ = shop_credit_;
 }