using System;

public class Program 

{

    public static void Main()

    {

        Baseclass bc = new Baseclass();

        (ISampleIF)bc.MtdIf();

    }

}

​

interface ISampleIF

{

    void MtdIf();

}

​

​

interface ISampleIF2

{

    void MtdIf();

}

​

public class Baseclass : ISampleIF, ISampleIF2

{

    public virtual void Mtd()

    {

        Console.WriteLine("MtdA");

    }

    public void MtdIf()

    {

    }

}

​