using System;

public class intclass

{

    public string snd;

    interface Ianimalsound //interface

    {

        void sound();

    }

    public string Snd   //properties

    {

        get{return snd;}

        set{snd=value;}

    }

}

public class der:intclass

{

public void sound()

{

Console.WriteLine("cat says meow");

}

​

    public static void Main()

    {

    der d=new der();

    d.sound();

    d.Snd="meow meow";

​

    Console.WriteLine(d.Snd);

    }

}