/// <summary>
/// Runners the observer.
/// </summary>
public static void RunnerObserver()
{
Product laptop = new Product("DELL", 1000);
Console.WriteLine("--------Customer 1 and Customer 2 is subscribed to the Laptop Product----------");
//// attach or subscribe customer 1
Customer customer1 = new Customer("customer 1");
laptop.Subscribe(customer1);
//// attach or subscribe customer 2
Customer customer2 = new Customer("customer 2");
laptop.Subscribe(customer2);
//// publish notification to the subscribers
laptop.Price = 800;
Console.WriteLine("--------customer 2 is unsubscribed and customer 3 is subscribed to the Laptop Product----------");
//// customer 2 is unsubscribed and customer 3 is subscribed
laptop.UnSubscribe(customer2);
Customer customer3 = new Customer("customer 3");
laptop.Subscribe(customer3);
laptop.Price = 900;
}
/// <summary>
/// the method for observer
/// </summary>
public void Observer()
{
Product laptop = new Product("DELL", 30000);
Console.WriteLine("Customer 1 and Customer 2 is subscribed to the Laptop Product");
//// attach or subscribe customer 1
Customer customer1 = new Customer("customer 1");
laptop.Subscribe(customer1);
//// attach or subscribe customer 2
Customer customer2 = new Customer("customer 2");
laptop.Subscribe(customer2);
laptop.Price = 25000;
}