using System;
class MainClass
{
static void Main(string[] args)
{
B MyB = new C();
MyB.Display();
}
}
abstract class A
{
public abstract void Display();
}
class B: A
{
public override void Display()
{
Console.WriteLine("Class B's Display Method");
}
}
class C: B
{
public override void Display()
{
Console.WriteLine("Class C's Display Method");
}
}
class D: C
{
public override void Display()
{
Console.WriteLine("Class D's Display Method");
}
}