private void SeachPhotos_Click(object sender, EventArgs e)
 {
     m_photosByUser = new List <Photo>();
     ImageListView.Clear();
     UserImageList.Dispose();
     foreach (Photo photo in m_photoList)
     {
         FacebookObjectCollection <PhotoTag> photoTags = photo.Tags;
         if (photo.Tags != null & !m_photosByUser.Contains(photo))
         {
             foreach (PhotoTag photoTag in photoTags)
             {
                 if (UserTagedWithList.CheckedItems.Contains(photoTag.User.Name))
                 {
                     m_photosByUser.Add(photo);
                 }
             }
         }
     }
     showPhotos(m_photosByUser);
 }