waiting for a popup to close

I was having a problem yesterday where the popup I was working on didn't close by the time the next one was supposed to be open.  I looked through the selenium api and realized there was no good waitForPopUpToClose command, so I created a new function.  All it does is wait until the number of windows is 1.  This will obviously only work if you have 1 window open (besides the popup).

        public void waitForPopupToClose()
        {
            string[] titles;
            for (int second = 0; second<timeoutSeconds; second++)
            {
                try
                {
                    titles = selenium.GetAllWindowTitles();
                    if (titles.Length > 1)
                        sleep(1000);
                    else
                    {
                        break;
                    }
                }
                catch (Exception)
                {
                  
                }
                Thread.Sleep(1000);
            }
        }