using System;
public class BaseClass {
protected string sb = "BaseClass";
public virtual void GetString() {
Console.WriteLine(sb);
}
}
class DerivedClass : BaseClass {
public string sd = "DerivedClass";
public override void GetString() {
base.GetString();
Console.WriteLine(sd);
}
}
class TestClass
{
static void Main()
{
DerivedClass o = new DerivedClass();
o.GetString();
}
}
/*
run:
BaseClass
DerivedClass
*/