C# 无意间写了一段线程死锁的代码

​源码如下：

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private void action_Click(object sender, RoutedEventArgs e)      {          Task t = new Task(() =>          {              for (int i = 0; i < 10; i++)              {                  Thread.Sleep(1000);                  this.Dispatcher.Invoke(() =>                          {                              lblStr.Content = i.ToString();                          });                  manualResetEvent.Set();                  Console.WriteLine(Thread.CurrentThread.ManagedThreadId);              }          });          t.Start();          t.Wait();          MessageBox.Show("123");      }

　　

正常屏蔽掉t.Wait();时，点击按钮，界面label会显示1到9，间隔1秒，

但是加上 t.Wait();直接就卡这里了。

修改为用ManualResetEvent等待，也是一样的效果

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ManualResetEvent manualResetEvent = new ManualResetEvent(false); ​         private void action_Click(object sender, RoutedEventArgs e)         {             Task t = new Task(() =>             {                 for (int i = 0; i < 10; i++)                 {                     Thread.Sleep(1000);                     this.Dispatcher.Invoke(() =>                             {                                 lblStr.Content = i.ToString();                             });                     manualResetEvent.Set();                 }             });             t.Start();             //t.Wait();             manualResetEvent.WaitOne();             MessageBox.Show("123");         }

　　然后在群里请教了几位大佬，大佬说是死锁了，指导用async和await去做

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private void action_Click(object sender, RoutedEventArgs e)         {             TaskTest();         } ​         public async void TaskTest()         {             await Task.Run(() =>              {                  for (int i = 0; i < 10; i++)                  {                      Thread.Sleep(1000);                      this.Dispatcher.Invoke(() =>                     {                         lblStr.Content = i.ToString();                     });                  }              });             MessageBox.Show("123");         }

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