Polymorphism and Virtual Functions : Abstract Class « Class « C# / CSharp Tutorial

1. C# / CSharp Tutorial
2. Class
3. Abstract Class

using System;

public abstract class Clock {
    public abstract void Play();
}

public class RedClock: Clock {
    public override void Play() {
        Console.WriteLine("RedClock.Play()");
    }
}
public class BlueClock: Clock{
    public override void Play() 
    {
        Console.WriteLine("BlueClock.Play()");
    }
}
class MainClass
{
    public static void CallPlay(Clock ms)
    {
        ms.Play();
    }
    public static void Main()
    {
        Clock ms = new RedClock();
        CallPlay(ms);
        ms = new BlueClock();
        CallPlay(ms);
    }
}

RedClock.Play()
BlueClock.Play()