static void Main(string[] args)
{
BuyTicketEvent bt = new BuyTicketEvent(MissChen.buyTicket);
bt();
//same type of paramater and return value can be declear as a same delegate
BuySomeEvent bf = new BuySomeEvent(MissChen.buyFood);
BuySomeEvent bp = new BuySomeEvent(MissChen.buyPhone);
AddFoodEvent af = new AddFoodEvent(MissChen.addFood);
int i = af(5);
askMissChenToBuySomeThings(bf, 10);
askMissChenToBuySomeThings(bp, 1);
Console.ReadLine();
}
public static void askMissChenToBuySomeThings(BuySomeEvent bs, int i)
{
bs(i);
}
