Exercises

1. Show the code for an event handler that uses the general-purpose (object sender, EventArgs e) syntax that will accept either the Timer.Elapsed event or the Connection.MessageArrived event from the code earlier in this chapter. The handler should output a string specifying which type of event has been received, along with the Message property of the MessageArrivedEventArgs parameter or the SignalTime property of the ElapsedEventArgs parameter, depending on which event occurs.

2. Modify the card game example to check for the more interesting winning condition of the popular card game rummy. This means that a player wins the game if their hand contains two "sets" of cards, one of which consists of three cards and one of which consists of four cards. A set is defined as either a sequence of cards of the same suit (such as 3H, 4H, 5H, 6H) or several cards of the same rank (such as 2H, 2D, 2S).