private static BackgroundWorker bg = new BackgroundWorker();

static void Main(string[] args) {
  bg.DoWork += bg_DoWork;
  bg.ProgressChanged += bg_ProgressChanged;
  bg.WorkerReportsProgress = true;
  bg.RunWorkerAsync();

  Thread.Sleep(10000);
}

static void bg_ProgressChanged(object sender,ProgressChangedEventArgs e) {
  Console.WriteLine(e.ProgressPercentage);
  Thread.Sleep(100);
  Console.WriteLine(e.ProgressPercentage);
}

static void bg_DoWork(object sender,DoWorkEventArgs e) {
  for (int i = 0; i < 10; i++) {
    bg.ReportProgress(i);
  }
}

运行时,我得到以下输出：

0
1
1
2
0
3
2
3
5
4
4
6
5
7
7
8
6
9
8
9

我知道问题是BackgroundWorker为每次调用ReportProgress启动的线程之间的竞争条件.

如何确保每个bg_ProgressChanged的整个主体按照我调用它们的顺序执行？
那是我想得到的

0 0 1 1 2 2 3 3 4 4 5 5 6 6 7 7 8 8 9 9

结果是.