public static void Depart(Person sender, TimeArgs e)
{
Console.WriteLine("{0} left.", sender.Name);
greetByUs -= sender.Greet;
goodByeByUs -= sender.GoodBye;
goodByeByUs?.Invoke(sender.Name, e.time);
}
public static void Arrive(Person sender, TimeArgs e)
{
Console.WriteLine("{0} came at {1} o'clock.", sender.Name, e.time.Hour);
greetByUs?.Invoke(sender.Name, e.time);
greetByUs += sender.Greet;
goodByeByUs += sender.GoodBye;
}
