public static void Enqueue(IfThumbnailItem item)
 {
     lock (_queue)
         _queue.Enqueue(item);
 }
 private static void NotifyThumbnailItem(IfThumbnailItem item)
 {
     item.OnThumbnailLoaded();
     _winMain.ThumbnailCacheStatus.Content = string.Format("Thumbnail Cached {0}/{1}", ClsThumbnailCache.Cached, ClsOptions.MaxCachedThumbnail);
 }