static void Main(string[] args)
{
MovieTickets mt = new MovieTickets();
TicketSales ts = new TicketSales();
ts.Subscribe(mt);
mt.PurchaseTickets(new DateTime(2016, 3, 25), "Split");
Console.Read();
}
public void Subscribe(MovieTickets tickets)
{
tickets.MovieChanged += new MovieTickets.MovieChangedHandler(NewPurchase);
}