using System;

public class Program

{

    private static Controle Controle;

    public static void Main()

    {

        Console.WriteLine("Hello World");

        Controle = new Controle();

        Controle.Ligar();

        Controle.Volume.Aumentar();

        Controle.Volume.Reduzir();

    }

}

​

public class Controle

{

    public Volume Volume {get; set;}

    public Controle()

    {

        Volume = new Volume();

    }

    public /*static*/ void Ligar()

    {

        Console.WriteLine("Ligado!");

    }

    public /*static*/ void Desligar()

    {

        Console.WriteLine("Desligado!");

    }

}

​

public class Volume

{

    public /*static*/ void Aumentar()

    {

        Console.WriteLine("Aumentar o Volume!");

    }

    public /*static*/ void Reduzir()

    {

        Console.WriteLine("Reduzir o Volume!");

    }

}