using System;

​

public class Program

{

    public static void Main()

    {

        Mp3 mp3 = new Mp3();

        mp3.trackMp3 = new TrackMp3();

        mp3.trackMp3.id = 1;

        mp3.trackMp3.nombre = "Pista mp3";

        mp3.trackMp3.año = 2022;

        mp3.trackMp3.disco = "Desconocido";

        mp3.trackMp3.formato = "mp3";

​

        Cd cd = new Cd();

        cd.trackCd = new TrackCd();

        cd.trackCd.id = 1;

        cd.trackCd.nombre = "Pista CD";

        cd.trackCd.año = 2022;

        cd.trackCd.disco = "sin titulo";

        cd.trackCd.duracion = 70;

        Reproductor reproductor = new Reproductor();

        reproductor.reproducir(cd.trackCd);

        reproductor.reproducir(mp3.trackMp3);

    }

​

    public class Reproductor

    {

        public void reproducir(TrackCd trackCd)

        {

            IInfo track = trackCd;

            Console.WriteLine(track.Info().ToString());

        }

        public void reproducir(TrackMp3 trackMp3)

        {

            IInfo track = trackMp3;

            Console.WriteLine(track.Info().ToString());

        }

    }

​

    public interface IInfo

    {

        string Info();

    }

​

    public class Track

    {

        public int id { get; set; }

        public string nombre { get; set; }

        public int año { get; set; }

        public string disco { get; set; }

    }

​

    public class TrackMp3 : Track, IInfo

    {

        public string formato { get; set; }

​

        string IInfo.Info()

        {

            String texto;

            return texto="Reproduciendo pista "+nombre+" "+formato+" "+ nombre+" "+año;

        }

    }

​

    public class TrackCd : Track, IInfo

    {

        public int duracion { get; set; }

​

        string IInfo.Info()

        {

            String texto;

            return texto="Reproduciendo pista "+nombre+" "+duracion+" "+ nombre+" "+año;

        }

    }

​

    public class Mp3

    {

        public TrackMp3 trackMp3 { get; set; }

    }

​

    public class Cd

    {

        public TrackCd trackCd { get; set; }

    }

​

}