using System;
public class BankAccount {
virtual public void Withdraw() {
Console.WriteLine("Call to BankAccount.Withdraw()");
}
}
public class SavingsAccount : BankAccount {
override public void Withdraw() {
Console.WriteLine("Call to SavingsAccount.Withdraw()");
}
}
public class MainClass {
public static void Main(string[] strings) {
BankAccount ba = new BankAccount();
Test(ba);
SavingsAccount sa = new SavingsAccount();
Test(sa);
}
public static void Test(BankAccount baArgument) {
if (baArgument is SavingsAccount) {
SavingsAccount saArgument = (SavingsAccount)baArgument;
saArgument.Withdraw();
} else {
baArgument.Withdraw();
}
}
}