问使用COM对象的BackgroundWorker会导致UI线程挂起

EN

public class User(){
  private BackgroundWorker Worker;
  private Queue<Action> ActionQueue;
  private COM COMObject; // COM is an interface exposed by the COM referenced in VS project
  private bool Registered;

  public User(){
    this.Registered = true;
    this.ActionQueue = new Queue<Action>();
    this.Worker = new BackgroundWorker();
    this.Worker.DoWork += new DoWorkEventHandler(DoWork);
    this.Worker.DoWork += new RunWorkerCompletedEventHandler(WorkerCompleted);
    this.Worker.Worker.WorkerSupportsCancellation = true;
    this.Worker.Worker.RunWorkerAsync();
    this.COMObject = new COM();
  }

  private DoWork(object sender, DoWorkEventArgs e){
    // If there is something to be done (an action) in the queue
    if (ActionQueue.Count > 0){
      // Dequeue the action from the queue
      Action queuedAction = ActionQueue.Dequeue();

      // Do the action
      queuedAction();
    }
  }

  private void WorkerCompleted(object sender, RunWorkerCompletedEventArgs e){
    // While this machine continues to be registered to the app...
    if (this.Registered)
    {
        Worker.RunWorkerAsync();
    }
  }

  public void ConnectToDatabase(){
    Action action = delegate {

      COMObject.Connect(); // function can take up to 10 seconds to return 
      
    }; // end of action delegate

    ActionQueue.Enqueue(action);
  }
}

User user = new User();
user.ConnectToDatabase();