using System;

​

public interface A

{

    void Metoda1();

}

​

public interface B : A

{

    void Metoda2();

    void Metoda3();

}

​

public class Afisare : B

{

    public void Metoda1()

    {

        Console.WriteLine(1);

    }

​

    public void Metoda2()

    {

        Console.WriteLine(2);

    }

​

    public void Metoda3()

    {

        Console.WriteLine(3);

    }

}

​

public class Program

{

    public static void Main()

    {

        Afisare nr=new Afisare();

        nr.Metoda1();

        nr.Metoda2();

        nr.Metoda3();

    }

}