• 通過Action型別傳遞方法作為引數

            Action a = Test;
            a.BeginInvoke(null, null);
            Thread.Sleep(10);//睡眠時間
            Console.WriteLine("Main");
            Console.ReadKey();

• 通過Func<>進行新建委託

            Func<string, int, int> a = Test1;
            IAsyncResult ar = a.BeginInvoke("hah", 199, null, null);
            Console.WriteLine("Main");
            while (ar.IsCompleted)
            {
                Console.Write("1");
            }
            int res = a.EndInvoke(ar);
            Console.ReadKey();
 

• 回撥函式

              Func<string> w = Write10;
              IAsyncResult ar = w.BeginInvoke(Oncallback, w);
              while (ar.IsCompleted) { }
              Console.ReadKey();

  static void Oncallback(IAsyncResult ar)
          {
  
              Func<string> w = (Func<string>) ar.AsyncState;
              string res = w.EndInvoke(ar);
              Console.WriteLine(res);
  
          }