using System;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var client = new Client();

        client.Do(new PlasticFactory());

        client.Do(new WoodenFactory());

    }

}

​

public class Client{

    public void Do(IFactory factory){

        factory.CreateChair();

        factory.CreateTable();

    }

}

​

public interface IFactory{

    Chair CreateChair();

    Table CreateTable();

}

​

public class PlasticFactory : IFactory{

    public Chair CreateChair(){

        return new PlasticChair();

    }

    public Table CreateTable(){

        return new PlasticTable();

    }

}

​

public class WoodenFactory : IFactory{

    public Chair CreateChair(){

        return new WoodenChair();

    }

    public Table CreateTable(){

        return new WoodenTable();

    }

}

​

public interface IProduct {

}

​

public abstract class Chair : IProduct{

}

​

public abstract class Table : IProduct{

}

​

public class PlasticChair : Chair {

    public PlasticChair(){

        Console.WriteLine("PlasticChair is created!");

    }  

}

​

public class PlasticTable : Table {

    public PlasticTable(){

        Console.WriteLine("PlasticTable is created!");

    }

}

​

public class WoodenChair : Chair {

    public WoodenChair(){

        Console.WriteLine("WoodenChair is created!");

    }

}

​

public class WoodenTable : Table {

    public WoodenTable(){

        Console.WriteLine("WoodenTable is created!");

    }

}