C# 委托

    public class User
    {
        public static void one()
        {
            Console.WriteLine("one");
        }

        public static void two()
        {
            Console.WriteLine("two");
        }
    }
    class Program
    {
        public delegate void UserEventHandler();
        static void Main(string[] args)
        {
            UserEventHandler handler = new UserEventHandler(User.one);
            handler += User.two;     //委托做两件事
            handler();
        }
    }