void Instance_favoriteImageFoundEvent(EUPItem item)
 {
     FavoritesListBox.Items.Add(item);
 }
 void Instance_recentImageFoundEvent(EUPItem item)
 {
     RecentListBox.Items.Add(item);
 }
        void guidHelper_imageFoundEvent(string imageUrl, string guid)
        {
            EUPItem item = new EUPItem();
            item.Thumbnail = imageUrl;
            item.Link = guid;

            if (recentImageFoundEvent != null)
                recentImageFoundEvent(item);
        }