MainPage.Xaml.cs

namespace AppUnno
{
    public partial class MainPage : PhoneApplicationPage
    {
    public ObservableCollection<PopularVideos> PopVideos;
        int aux = 3;
        private List<Artista> _artistas;

        // Constructor
        public MainPage()
        {
            PopVideos = new ObservableCollection<PopularVideos>();
            if (NetworkInterface.GetIsNetworkAvailable())
            {
                InitializeComponent();
                ConsultaArtista("http://www.unnu.com/music-artists");
                //ConsultaPopularVideos("http://www.unnu.com/popular-music-videos");
                panorama.Visibility = Visibility.Collapsed;
                // Set the data context of the listbox control to the sample data
                //DataContext = App.ViewModel;

                // you are setting your DataContext to 'App.ViewModel',
                //if you aren't using it, do the following instead:
                DataContext = this;
                this.Loaded += new RoutedEventHandler(MainPage_Loaded);
                carregaFeed();
                ApplicationBarra(aux);
                HtmlWeb.LoadAsync("http://www.unnu.com/popular-music-videos", DownLoadCompleted);
            }
            else
            {
                var result = MessageBox.Show("There are problems in your connection. Please verify your connection and try again!", "", MessageBoxButton.OK);
                aux = 1;
                ApplicationBarra(aux);
            }
        }
    private void DownLoadCompleted(object sender, HtmlDocumentLoadCompleted e)
    {
        PopVideos.Clear();
        var data = e.Document.DocumentNode.SelectSingleNode("//div[@class='content']")
           .Descendants("img")
           .Select(img => new PopularVideos()
           {
               Titulo = img.Attributes["alt"].Value,
               Url = img.Attributes["src"].Value,
           }).ToList();

        Deployment.Current.Dispatcher.BeginInvoke(() =>
        {

            foreach (var item in data)
            {
                PopVideos.Add(new PopularVideos(item.Titulo, item.Url));
            }
        });
    }