private static void EnglishGreeting(string name) {
               Console.WriteLine("Morning, " + name);
           }

           private static void ChineseGreeting(string name) {
               Console.WriteLine("早上好, " + name);
           }

   

           static void Main(string[] args) {
       
               GreetingDelegate gd = EnglishGreeting;
               gd += ChineseGreeting;
               gd("多播调用");

               Console.ReadKey();
           }

   int invCount= gd.GetInvocationList().Count();

   GreetingDelegate gd = EnglishGreeting;
               gd -= EnglishGreeting;

               gd += ChineseGreeting;

               gd("多播调用");
               int invCount= gd.GetInvocationList().Count();
               Console.WriteLine(invCount);
               Console.ReadKey();