static void Main(string[] args)
{
/* https://docs.microsoft.com/en-us/dotnet/standard/events/observer-design-pattern */
BaggageProvider provider = new BaggageProvider();
BaggageObserver observer1 = new BaggageObserver("BaggageClaimMonitor");
BaggageObserver observer2 = new BaggageObserver("SecurityExit");
provider.BaggageStatus(712, "Detroit", 3);
observer1.Subscribe(provider);
provider.BaggageStatus(712, "Kalamazoo", 3);
provider.BaggageStatus(400, "New York-Kennedy", 1);
provider.BaggageStatus(712, "Detroit", 3);
observer2.Subscribe(provider);
provider.BaggageStatus(511, "San Francisco", 2);
provider.BaggageStatus(712);
observer2.Unsubscribe();
provider.BaggageStatus(400);
provider.LastBaggageClaimed();
Console.ReadLine();
}
public virtual void Subscribe(BaggageProvider provider)
{
_cancellation = provider.Subscribe(this);
}
