using System;

​

public class Program

{

    public static void Main()

    {

        Client client = new Client(); 

        client.Do(new DuckCreator());

        client.Do(new DogCreator());

    }

}

​

public class Client{

    public void Do(ICreator creator){

        creator.CreateProduct();

    }

}

​

public interface ICreator

{

    IProduct CreateProduct();

}

​

public class DuckCreator : ICreator

{

    public IProduct CreateProduct() {

        return new DuckProduct();

    }

}

​

public class DogCreator : ICreator

{

    public IProduct CreateProduct() {

        return new DogProduct();

    }

}

​

public interface IProduct{

​

}

​

public class DuckProduct : IProduct {

    public DuckProduct(){

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

    }

}

public class DogProduct : IProduct {

    public DogProduct(){

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

    }

}