public void Delete(int id)
 {
     var orderItem = new OrderItemDa(databasecontext);
     if (id > 0)
     {
         var currentOrderItem = GetById(id);
         orderItem.Delete(currentOrderItem);
     }
 }
        public OrderItem Save(int id, int OrderId, string Item)
        {
            var orderItem = id > 0 ? GetById(id) : new OrderItem();

            orderItem.OrderId = OrderId;
            orderItem.Item = Item;

            var orderItemDa = new OrderItemDa(databasecontext);

            //if new
            if (id < 1) orderItem = orderItemDa.Add(orderItem);
            //update
            else orderItem = orderItemDa.Update(orderItem);
            return orderItem;
        }