I tried the following (pseudocode) but I always get a deadlock when Iam trying to stop my thread. The problem is that Join() waits for the thread to complete and a pending Invoke() operation is also waiting to complete. How can I solve this?

Thread workerThread = new Thread(BackupThreadRunner);
volatile bool cancel;

// this is the thread worker routine
void BackupThreadRunner()       
{
  while (!cancel)
  { 
     DoStuff();
     ReportProgress();
  }
}

// main thread
void ReportProgress()
{
   if (InvokeRequired)
   {
      Invoke(ReportProgress);
   }
   UpdateStatusBarAndStuff();
}

// main thread
void DoCancel()
{
   cancel=true;
   workerThread.Join();
}