using System;

namespace AbstractFactoryPattern

{

// these are our AbstractProduct participants

abstract class Sandwich { }

abstract class Dessert { }

// Next, we need an abstract class that will return a Sandwich and a Dessert (this is the AbstractFactory participant)

abstract class RecipeFactory

{

public abstract Sandwich CreateSandwich();

public abstract Dessert CreateDessert();

}

// Now we can start implementing the actual objects.

// First let's consider the ADULT MENU (these next classes are ConcreteProduct objects):

class BLT : Sandwich { }

class CremeBrulee : Dessert { }

// We also need a _ConcreteFactory_ which implements the AbstractFactory and returns the adult recipes:

class AdultCuisineFactory : RecipeFactory

{

public override Sandwich CreateSandwich()

{

return new BLT();

}

public override Dessert CreateDessert()

{

return new CremeBrulee();

}

}

// Now let's define the CHILD's recipes. Here are the ConcreteProduct classes and ConcreteFactory for said recipes:

class GrilledCheese : Sandwich { }

class IceCreamSundae : Dessert { }

class KidCuisineFactory : RecipeFactory

{

public override Sandwich CreateSandwich()

{

return new GrilledCheese();

}

public override Dessert CreateDessert()

{

return new IceCreamSundae();

}

}

// How do we use this?

// First, let's ask the user if they are an adult or a child, then display the corresponding menu items.

class Program

{

static void Main(string[] args)

{

Console.WriteLine("Who are you? (A)dult or (C)hild?");

char input = Console.ReadKey().KeyChar;

RecipeFactory recipeFactory;

switch (input)

{

case 'a':

recipeFactory = new AdultCuisineFactory();

break;

case 'c':

recipeFactory = new KidCuisineFactory();

break;

default:

throw new NotImplementedException();

}

var sandwich = recipeFactory.CreateSandwich();

var dessert = recipeFactory.CreateDessert();

Console.WriteLine();

Console.WriteLine("Sandwich: " + sandwich.GetType().Name);

Console.WriteLine("Dessert: " + dessert.GetType().Name);

Console.ReadKey();

}

}

}