using System;

public class Program

{

    public static void Main()

    {

        var boring = new BoringPlugin();

        Console.WriteLine(boring.Output());

        var exciting = new ExcitingPlugin();

        Console.WriteLine(exciting.Output());

    }

}

​

public abstract class Plugin

{

    public virtual string Output()

    {

        return "Default";

    }

}

​

public class BoringPlugin : Plugin 

{

    public override string Output()

    {

        return base.Output();

    }

}

​

public class ExcitingPlugin : Plugin

{

    public override string Output()

    {

        return "No boring defaults here!";

    }

}