Question

I have following code

private void btnClose_Click(object sender, System.EventArgs e)
{
     Close();
} // btnClose_Click

After running the close winforms function the application freezes. Any idea why it can happen?

I use .net 2.0 and i run under Windows 7 vs2005

EDIT:

After I pressed pause in the debugger I came to

private void MainForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
  // GUI
  if (FScannerThread_Running)
  {
    FScannerThread_Running = false;
    FScannerThread.Join();
  }
}

And it stacked in FScannerThread.Join(); any idea how i can kill it ?

Answer 1

Use the bool Thread.Join(int milliseconds) overload, and if the result is false, Abort() your thread.

private void MainForm_Closing(object sender, System.ComponentModel.CancelEventArgs e)
{
    // GUI
    if (FScannerThread_Running)
    {
        FScannerThread_Running = false;
        if (!FScannerThread.Join(1000)) // Give the thread 1 sec to stop
        {
            FScanner.Abort();
        }    
    }
}

Note that you should catch ThreadAbortException in your thread in order to end it gracefully (if you have something to release for instance).