[TestMethod]
         public void CSOBTest_MakeLoan_OK()
         {
             //Arrange
             CSOB csob = new CSOB();
             csob.accountBalance = 1000;
             csob.accountNumber = "111111111111/0600";

             //Act
             bool result = csob.MakeLoan(2000, 3.3, 24, 25000);

             //Assert
             Assert.AreEqual(true, result);
         }