using System;

​

namespace MultipleInterfaces

{

    interface Device

    {

        void SwitchOn();

        void SwitchOff();

    }

​

    interface Volume

    {

        void VolumeUp();

        void VolumeDown();

    }

​

    interface Pluggable

    {

        void PlugIn();

        void PlugOff();

    }

​

    class CellPhone : Device, Volume, Pluggable

    {

        public void SwitchOn()

        {

            Console.WriteLine("Switching on");

        }

​

        public void SwitchOff()

        {

            Console.WriteLine("Switching on");

        }

​

        public void VolumeUp()

        {

            Console.WriteLine("Volume up");

        }

​

        public void VolumeDown()

        {

            Console.WriteLine("Volume down");

        }

​

        public void PlugIn()

        {

            Console.WriteLine("Plugging In");

        }

​

        public void PlugOff()

        {

            Console.WriteLine("Plugging Off");

        }

    }

​

    public class Program

    {

        public static void Main(string[] args)

        {

            var cellPhone = new CellPhone();

            cellPhone.SwitchOn();

            cellPhone.PlugIn();

​

        }

    }

}