public void TestDepositSavings1()
        {
            SavingsAccount acc = new SavingsAccount(1120002895, Convert.ToDecimal(1000.000000000), "Nmae", DateTime.Now);

            decimal amount = 500000;

            decimal expected = acc.AvailableBalance + amount;

            acc.CreditAccount(amount);

            decimal actual = acc.AvailableBalance;

            Assert.AreEqual(actual, expected);
        }
        public void TestDepositSavings2()
        {
            SavingsAccount acc = new SavingsAccount(1120002895, Convert.ToDecimal(1000.000000000), "Nmae", DateTime.Now);

            decimal amount = -1;

            acc.CreditAccount(amount);
        }