using System;

​

public class Program

{

    public static void Main()

    {

​

    }

}

​

abstract class Factory

{

   public abstract Product Create();

}

​

class FactoryA : Factory

{

    public override Product Create()

    {

        return new ProductA();

    }

}

​

class FactoryB : Factory

{

    public override Product Create()

    {

        return new ProductB();

    }

}

​

abstract class Product

{

    public string Name;

}

​

class ProductA : Product

{

    public ProductA()

    {

        this.Name = "Pepsi";

    }

}

​

class ProductB : Product

{

    public ProductB()

    {

        this.Name = "Coke";

    }

}