title: Thread doesn't wake up after join
body: <p>I've got a GUI interface which has a start and a cancel button. After starting, the main thread which is the GUI thread, is creating a second thread which will do the actual work. When pressing the cancel button, all it does is set a boolean value which tells the working thread to stop its work and end. The problem is that the main GUI thread remain stuck even though I'm sure that the working thread has finished what it was doing. Why is that?</p>
  
  <p>Here is some of the code:</p>
  
  <pre><code>    private Thread workerThread;
      private SomeClass fs;
  
      private void buttonSearch_Click(object sender, EventArgs e)
      {
        //do some initializations
        fs = new SomeClass();
        workerThread = new Thread(fs.WorkMethod);
        workerThread.Start();
      }
  
      private void buttonCancel_Click(object sender, EventArgs e)
      {
           fs.StopWork();
           workerThread.Join();
      }
  
  
      inside SomeClass:
  
      private bool keepWorking;
  
      public void StopWork()
      {
          keepWorking= false;
      }
  
      public void WorkMethod()
      {
         if (keepWorking)
          {
              //do some stuff with recursion
           }
      }
  </code></pre>
  
  <p>does someone know why won't the main thread wake up after calling join?
  I have also tried debugging to see what happens if I change the keepWorking variable to false manually and the method does reach its' end.</p>