static void Main(string[] args)
{
// Create price watch for Carrots and attach restaurants that buy carrots from suppliers.
Carrots carrots = new Carrots(0.82);
carrots.AddObserver(new Restaurant("Bubbles", 0.99, carrots));
carrots.AddObserver(new Restaurant("Johns", 0.75, carrots));
carrots.AddObserver(new Restaurant("Steve's'", 0.77, carrots));
Broccoli broccoli = new Broccoli(.75);
IRestaurant bubbles = new Restaurant("Bubbles", .99, broccoli);
broccoli.AddObserver(bubbles);
broccoli.PricePerPound = .45;
// Fluctuating carrot prices will notify subscribing restaurants.
carrots.PricePerPound = .77;
carrots.PricePerPound = .50;
carrots.PricePerPound = 10;
carrots.PricePerPound = .84;
Console.ReadLine();
}
