public PhotoInfoViewModel()
 {
     BackCommand = new DelegateCommand(BackCommandHandler, null, false);
     MapCommand = new DelegateCommand(MapCommandHandler, null, false);
     navService = new NavigationService();
     flRepository = new FlickrRepository();
     exManager = new ExceptionManager();
 }
        private void SearchImages(string title)
        {
            try
            {

                var flicrRepository = new FlickrRepository();
                Photos = new ScrollableObservableCollection(flicrRepository.LoadImages(CurrentPage, title).Result, title);

            }
            catch (Exception ex)
            {
                exManager.PublishError(ex.Message);
            }
        }