using System;

​

public interface I1

{

 void print1();

 void print2();      

}

​

public class i1:I1

{

    public void print1()

    {

     Console.WriteLine("this is print1 method");

    }

    public void print2()

    {

    Console.WriteLine("this is print2 method");

    }

​

}

​

​

public interface I2

{

​

void print3();

void print4();  

​

}

​

public class i2:I2

{

  public void print3()

  {

    Console.WriteLine("this is from print3 method");

  }

  public void print4()

  {

    Console.WriteLine("this is from print4 method");

  }

​

}

​

public class i1_2:I1,I2

{

    i1 ob1=new i1();

    i2 ob2=new i2();

    public void print1()

    {

        ob1.print1();       

    }

    public void print2()

    {

        ob1.print2();

    }

    public void print3()

    {

        ob2.print3();

    }

    public void print4()

    {

        ob2.print4();

    }

}