public void TransferTo(double x, Account2 b)
        {
            if (balance > x)
            {
                //Deduct from A
                this.balance = balance - x;

                //Add to accnt B
                b.Deposit(x);
            }
            else
            {
                Console.WriteLine("Error. Your balance is less than the transfered amount");
            }
        }
        static void Main(string[] args)
        {
            Customer2 y = new Customer2("Tan Ah Kow", "20, Seaside Road", "XXX20", new DateTime(1989, 10, 11));
            Customer2 z = new Customer2("Kim Lee Keng", "2, Rich View", "XXX9F", new DateTime(1993, 4, 25));
            Account2  a = new Account2("001-001-001", y, 2000);
            Account2  b = new Account2("001-001-002", z, 5000);

            Console.WriteLine(a.Show());
            Console.WriteLine(b.Show());
            a.Deposit(100);
            Console.WriteLine(a.Show());
            a.Withdraw(200);
            Console.WriteLine(a.Show());
            a.TransferTo(300, b);
            Console.WriteLine(a.Show());
            Console.WriteLine(b.Show());

            int n1 = y.Age;

            Console.WriteLine(n1);
            int n2 = z.Age;

            Console.WriteLine(n2);
        }