C#多播委托（Multicast Delegate）

namespace ConsoleApplication
{
    class MulticastDelegates
    {
        //声明一个委托，委托返回值为void
        public delegate void Greetings(String name);

        public static void Hello(String name)
        {
            Console.WriteLine("您好, {0}!", name);
        }

        public static void GoodBye(String name)
        {
            Console.WriteLine("再见, {0}!", name);
        }

        public static void Main()
        {
            Greetings greetings = Hello;
            //使用+=给委托添加方法
            greetings += GoodBye;
            String name = "周杰伦";
            Console.WriteLine("这是一种调用方法：");
            greetings(name);
            Console.WriteLine("这是另一种使用方法");
            //返回委托的调用列表。
            Delegate[] delegates = greetings.GetInvocationList();
            //注意这里的delegates列表中存储的是Greetings类型的委托
            foreach (Greetings greeting in delegates)
            {
                greeting(name);
            }
        }
    }
}