private WaitHandle Scrape(Tracker tracker, bool trySubsequent)
{
if (tracker == null)
{
throw new ArgumentNullException("tracker");
}
if (!tracker.CanScrape)
{
throw new TorrentException("This tracker does not support scraping");
}
TrackerConnectionID id = new TrackerConnectionID(tracker, trySubsequent, TorrentEvent.None, new ManualResetEvent(false));
tracker.Scrape(new ScrapeParameters(this.infoHash), id);
return(id.WaitHandle);
}