using System;

​

public interface IDevice

{

    void TurnOn();

    void TurnOff();

    void SetChannel(int number);

}

public class SonyTV : IDevice

{

    public void SetChannel(int number)

    {

        Console.WriteLine("SonyTV Set Channel");

    }

​

    public void TurnOff()

    {

        Console.WriteLine("SonyTV Turn Off");

    }

​

    public void TurnOn()

    {

        Console.WriteLine("SonyTV Turn On");

    }

}

public class SamsungTV: IDevice

{

    public void SetChannel(int number)

    {

        Console.WriteLine("SamsungTV Set Channel");

    }

​

    public void TurnOff()

    {

        Console.WriteLine("SamsungTV Turn Off");

    }

​

    public void TurnOn()

    {

        Console.WriteLine("SamsungTV Turn On");

    }

}

public class RemoteControl

{

    protected IDevice device;

​

    public RemoteControl(IDevice device)

    {

        this.device = device;

    }

​

    public void TurnOn()

    {

        device.TurnOn();

    }

    public void TurnOff()

    {

        device.TurnOff();

    }

}

public class AdvancedRemoteControl : RemoteControl

{

    public AdvancedRemoteControl(IDevice device) : base(device)

    {

    }

​

    public void SetChannel(int number)

    {

        device.SetChannel(number);

    }

}

public class Program

{

    public static void Main()

    {

        var remoteControl = new AdvancedRemoteControl(new SamsungTV());

        remoteControl.TurnOn();

    }

}