private void AddTopic(string topic, CultureInfo culture)
 {
     try
     {
         lookupManager.AddLookup(topic, culture);
     }
     catch (QuotePageNotFoundException e)
     {
         TaskDialog td = new TaskDialog(this,
                                        "Topic Not Found",
                                        "We couldn't find \"" + e.Topic + "\" in the topic database.",
                                        MessageType.Error);
         td.ShowDialog();
     }
 }