public void ChangeStatus(Order order)
        {
            StringBuilder sqlCmd = new StringBuilder();

            if (order.OrderStatus == "Delivered")
            {
                order.EndDate = DateTime.Now;
                sqlCmd.Append($"update ORDERS set OrderStatus = '{order.OrderStatus}', EndDate = '{order.EndDate}' where Id = {order.Id};");
            }
            else
            {
                sqlCmd.Append($"update ORDERS set OrderStatus = '{order.OrderStatus}' where Id = {order.Id};");
            }
            OrderMethods.ChangeStatus(Connection, sqlCmd.ToString());
        }