using System;

public class Program

{

    public static void Main()

    {

        Engine engine = new Engine (false, true);

        engine.TurnThruster1On();

        engine.TurnThruster2On();

        Console.WriteLine(engine.Thruster1);

        Console.WriteLine(engine.Thruster2);

    }

}

​

class Engine :Thruster1

{

    public bool Thruster1 { get; set; }

    public bool Thruster2 { get; set; }

    public Engine(bool thruster1, bool thruster2)

    {

        Thruster1 = thruster1;

        Thruster2 = thruster2;

    }

​

    public void TurnThruster1On()

    {

        base.TurnOn();

    }

    public void TurnThruster2On()

    {

        base.TurnOn();

    }

}

internal class Thruster1 : Thruster2

{

    protected internal bool Turned = false;

    protected internal void TurnOn()

    {

        Turned = true;

        Console.WriteLine(Turned);

    }

}

internal class Thruster2

{

    protected internal bool Turned = false;

    protected internal void TurnOn()

    {

        Turned = true;

        Console.WriteLine(Turned);

    }

}

​