private static void Main(string[] args)
        {
            User user1 = new User();
            user1.ID = 1;
            user1.Name = "Tom";

            User user2 = new User();
            user2.ID = 2;
            user2.Name = "Jane";

            SqlserverUser su = new SqlserverUser();
            su.Insert(user1);
            su.Insert(user2);

            User resultUser1 = su.GetUser(1);
            User resultUser2 = su.GetUser(2);

            Console.ReadLine();
        }
        private static void Main(string[] args)
        {
            User user1 = new User();

            user1.ID   = 1;
            user1.Name = "Tom";

            User user2 = new User();

            user2.ID   = 2;
            user2.Name = "Jane";

            SqlserverUser su = new SqlserverUser();

            su.Insert(user1);
            su.Insert(user2);

            User resultUser1 = su.GetUser(1);
            User resultUser2 = su.GetUser(2);

            Console.ReadLine();
        }