public override void Register(Participant participant)
{
if (!participants.ContainsKey(participant.Name))
{
participants[participant.Name] = participant;
}
participant.Chatroom = this;
}
static void Main()
{
var chatroom = new Chatroom();
var dave = new Participant { Name = "dave" };
var lisa = new Participant { Name = "lisa" };
var mike = new Participant { Name = "mike" };
chatroom.Register(dave);
chatroom.Register(lisa);
chatroom.Register(mike);
dave.Send("lisa", "hello lisa");
lisa.Send("dave", "hi");
mike.Send("dave", "can we meet?");
Console.ReadLine();
}
public abstract void Register(Participant participant);
