使用后台工作者手动停止调试

我正在使用BackgroundWorker(一个带进度条的弹出窗口)编写一个WPF c#项目。

我开始调试(F5键)检查我的程序。关闭BackgroundWorker后，关闭MainWindow不会自动停止调试进程。我必须手动点击Shift+F5来停止调试。

我认为BackgroundWorker应该自动处理线程。但无论如何，我仍然在RunWorkerCompleted方法中调用backgroundworker.Dispose()和backgroundworker.CancelAsync()。然而，在关闭弹出窗口和完成BackgroundWorker时，我仍然必须手动执行Shift+F5以停止调试。

在后台发生了什么，避免程序自动停止调试?我怎样才能知道呢?

注意:我已经确保后台工作者完成DoWork并在我关闭它之前完成。有了弹出窗口和BackgroundWorker，它会在我关闭主窗口的那一刻自动停止调试。

[EDIT with codes]

public partial class MainWindow : Window
{
    BackgroundWorker backgroundworker1 = new BackgroundWorker();
    PopUp pop1 = new PopUp();
public MainWindow()
{
    InitializeComponent();
    backgroundworker1.DoWork += BackgroundWorker_DoWork;
    backgroundworker1.RunWorkerCompleted += BackgroundWorker_RunWorkerCompleted;
    backgroundworker1.WorkerReportsProgress = true;
    backgroundworker1.ProgressChanged += BackgroundWorker_ProgressChanged;
    backgroundworker1.WorkerSupportsCancellation = true;
}
private void startBtn_Click(object sender, RoutedEventArgs e)
{
    pop1 = new PopUp();
    int iteration = 0;
    if (int.TryParse(iterationTb1.Text, out iteration))
    {
        pop1.Show();
        backgroundworker1.Dispose();
        backgroundworker1.RunWorkerAsync(iteration);
        outputTb1.Text = "running...";
    }
}
private void cancelBtn_Click(object sender, RoutedEventArgs e)
{
    pop1.Close();
    backgroundworker1.CancelAsync();
}
public static int DoSlowProcess(int iterations, BackgroundWorker worker, DoWorkEventArgs e)
{
    int result = 0;
    for (int i = 0; i <= iterations; i++)
    {
        if (worker != null)
        {
            if (worker.CancellationPending)
            {
                e.Cancel = true;
                return result;
            }
            if (worker.WorkerReportsProgress)
            {
                int percentComplete = (int)((float)i / (float)iterations * 100);
                worker.ReportProgress(percentComplete);
            }
        }
        Thread.Sleep(100);
        result = i;
    }
    return result;
}

private void BackgroundWorker_DoWork(object sender, DoWorkEventArgs e)
{
    var bgw = sender as BackgroundWorker;
    e.Result = DoSlowProcess((int)e.Argument, bgw, e);
}
private void BackgroundWorker_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
{
    if (e.Error != null)
    {
        MessageBox.Show(e.Error.Message);
    }
    else if (e.Cancelled)
    {
        outputTb1.Text = "Canceled";
    }
    else
    {
        outputTb1.Text = e.Result.ToString();
        backgroundworker1.CancelAsync();
        backgroundworker1.Dispose();
        pop1.Close();
        pop1.progressBar1.Value = 0;
    }
}
    private void BackgroundWorker_ProgressChanged(object sender, ProgressChangedEventArgs e)
    {
        pop1.progressBar1.Value = e.ProgressPercentage;
        pop1.progressLb1.Content = e.ProgressPercentage.ToString();
    }
}

// PopUp pop1 = new PopUp();  <-- this never-used Win was blocking your close-down.
PopUp pop1 = null;

pop1 = new PopUp();
int iteration = 0;