Task用法（2）-任务等待wait

 static void Main(string[] args)
        {
            Task t = Task.Run(() =>
              {
                  Thread.Sleep(500);
                  Console.WriteLine("Lance");
                  Thread.Sleep(500);
              });
            Console.WriteLine("t.IsCompleted=" + t.IsCompleted);
            t.Wait();
            Console.WriteLine("t.IsCompleted=" + t.IsCompleted);
        }

 static void Main(string[] args)
        {
            Task t = Task.Run(() =>
              {
                  Thread.Sleep(500);
                  Console.WriteLine("Lance");
                  Thread.Sleep(500);
              });
            Console.WriteLine("t.IsCompleted=" + t.IsCompleted);
            bool IsComplate= t.Wait(200);
            Console.WriteLine("wait 200毫秒后 t.IsCompleted=" + t.IsCompleted);
            Thread.Sleep(1000);
            Console.WriteLine("t.IsCompleted=" + t.IsCompleted);
        }