using System;

​

public class Gun

{

    public virtual void Shoot()

    {

        Console.WriteLine("Gun Shoot called.");

    }

}

​

public class GunAuto : Gun

{

    public override void Shoot()

    {

        Console.WriteLine("GunAuto Shoot called.");

    }

}

​

public class GunBurst : GunAuto

{

    public override void Shoot()

    {

        base.Shoot();

        Console.WriteLine("GunBurst Shoot called.");

    }

}

public class Program

{

    public static void Main()

    {

        var burst = new GunBurst();

        burst.Shoot();

    }

}