public void deleteTest()
        {
            Order deleteObj = new Order("001", "A", "a", 11000);

            OrderServer.delete(deleteObj);
            List <Order> Inf2 = new List <Order>()
            {
                new Order("002", "B", "b", 9000),
                new Order("003", "C", "c", 15000),
            };

            Assert.AreEqual(Inf2, Inf2);
        }