using System;



public abstract class Wall

{

    public abstract void Display();

}



public class ModernWall:Wall

{

    public override void Display()

    {

        Console.WriteLine("ModernWall Builded");

    }

}



public class ClassicalWall:Wall

{

    public override void Display()

    {

        Console.WriteLine("ClassicalWall Builded");

    }

}



public abstract class Room

{

    public abstract void Display();

}



public class ModernRoom:Room

{

    public override void Display()

    {

        Console.WriteLine("ModernRoom Builded");

    }

}



public class ClassicalRoom:Room

{

    public override void Display()

    {

        Console.WriteLine("ClassicalRoom Builded");

    }

}



public abstract class AbstractFactory

{

    public abstract Wall CreateWall();

    public abstract Room CreateRoom();

}



public class ModernFactory:AbstractFactory

{

    public override Wall CreateWall()

    {

        return new ModernWall();

    }

    public override Room CreateRoom()

    {

        return new ModernRoom();

    }

}



public class ClassicalFactory:AbstractFactory

{

    public override Wall CreateWall()

    {

        return new ClassicalWall();

    }

    public override Room CreateRoom()

    {

        return new ClassicalRoom();

    }

}