using System;

public class Program

{

    private static Controle Controle;

    public static void Main()

    {

        Controle.Volume.Aumentar();

    }

}

​

public class Controle

{   

    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!");

        }

    }

}

​