//Program to demonstrate Multi Level inheritance using Interface

​

using System;

​

interface MyInf

{

    void Method1();

}

​

class Sample1 : MyInf

{

    public void Method1()

    {

        Console.WriteLine("Method1() called");

    }

}

​

class Sample2 : Sample1

{

    public void Method2()

    {

        Console.WriteLine("Method2() called");

    }

}

​

class Sample3 : Sample2

{

    public void Method3()

    {

        Console.WriteLine("Method3() called");

    }

}

public class Program

{

    public static void Main()

    {

        Sample3 S=new Sample3();

        S.Method1();

        S.Method2();

        S.Method3();

    }

}