创建收藏夹页面

我正试图创建一个收藏夹页面，用户可以通过该页面将网络浏览器的当前url添加到可观察集合中，可以随时选择该集合将用户发送到该收藏夹的url。我尝试创建一个绑定到列表框的observalecollection，当用户选择将当前url（在主页上）添加到收藏夹页面的列表框时，该列表框将被填充（在0索引处）。到目前为止，我有以下内容，但没有填充我的列表框，我不确定为什么？

主页.xaml

<phone:PhoneApplicationPage.ApplicationBar>
    <shell:ApplicationBar Opacity=".5" IsVisible="True" IsMenuEnabled="True">
        ...            
        <shell:ApplicationBar.MenuItems>
            <shell:ApplicationBarMenuItem Text="add to favorites" Click="AddToFavorites_Click"/>      
        </shell:ApplicationBar.MenuItems>
    </shell:ApplicationBar>
</phone:PhoneApplicationPage.ApplicationBar>

主页.xaml.cs

void AddToFavorites_Click(object sender, EventArgs e)
    {
        this.NavigationService.Navigate(new Uri("/FavoritesPage.xaml?curUrl=" + TheBrowser.currentUrl(), UriKind.Relative));
    }

我创建了一个Favorite类，用于构建绑定到Listbox 的Favorites observaleCollection

Favorite.cs

  public class Favorite : INotifyPropertyChanged
{
    public event PropertyChangedEventHandler PropertyChanged;
    //A helper method used by the properties
    void OnPropertyChanged(string propertyName)
    {
        PropertyChangedEventHandler handler = this.PropertyChanged;
        if (handler != null)
        {
            handler(this, new PropertyChangedEventArgs(propertyName));
        }
    }
    DateTimeOffset modified;
    public DateTimeOffset Modified
    {
        get { return this.modified; }
        set { this.modified = value; OnPropertyChanged("Modified"); }
    }
    //Title for name of Favorite
    //Settings.currentFavorite holds the currentUrl to be used as the title
    string title = Settings.currentFavorite.Value;
    public string Title
    {
        get { return this.title;}
        set { this.title = value; OnPropertyChanged("Title"); }
    }

上面的这个Favorite.cs类在我的FavoritesPage中使用如下：

Favorite.xaml

<ListBox x:Name="FavoritesListBox" Grid.Row="1" ItemsSource="{Binding}"
             SelectionChanged="FavoritesListBox_SelectionChanged">
        <ListBox.ItemTemplate>
            <DataTemplate>
                <StackPanel>
                    <Border Margin="24,0" toolkit:TiltEffect.IsTiltEnabled="True">
                        <TextBlock Text="{Binding Title}" Margin="12"/>
                    </Border>
                    <TextBlock Foreground="{StaticResource PhoneSubtleBrush}"
                               Text="{Binding Modified, Converter={StaticResource DateConverter}}"
                               Margin="24,0,0,12"/>
                </StackPanel>
            </DataTemplate>
        </ListBox.ItemTemplate>
    </ListBox>

Favorite.xaml.cs

public partial class FavoritesPage : PhoneApplicationPage
{
    //current url from querystring
    string favoriteUrl;
    //temporary state
    public static readonly Setting<int> CurrentFavoritesIndex = new Setting<int>("CurrentFavoritesIndex", -1);
    //the users data
    public static readonly Setting<ObservableCollection<Favorite>> FavoritesList = 
        new Setting<ObservableCollection<Favorite>>("FavoritesList", new ObservableCollection<Favorite>());
    public FavoritesPage()
    {
        InitializeComponent();
        //this.FavoritesListBox.DataContext = this;
        //bind the favorites list as the data source for the FavoritesListBox
        //this.DataContext = FavoritesList.Value;
    }
    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
        base.OnNavigatedTo(e);
        //gets the current Url
        NavigationContext.QueryString.TryGetValue("curUrl", out favoriteUrl);
        Settings.currentFavorite.Value = favoriteUrl;
        //clear the selection so selecting the same item twice in a row will still raise the SelectionChanged event
        CurrentFavoritesIndex.Value = -1;
        this.FavoritesListBox.SelectedIndex = -1;
        //bind the favorites list as the data source for the FavoritesListBox
        this.DataContext = FavoritesList.Value;
    }
    protected override void OnNavigatedFrom(NavigationEventArgs e)
    {
        base.OnNavigatedFrom(e);
        //Favorite fav = FavoritesList.Value[CurrentFavoritesIndex.Value];
        //fav.Modified = DateTimeOffset.Now;
    }            
    void FavoritesListBox_SelectionChanged(object sender, SelectionChangedEventArgs e)
    {
        if (FavoritesListBox.SelectedIndex >= 0)
        {
            //Navigate to the webbrowser page for the selected item
            CurrentFavoritesIndex.Value = FavoritesListBox.SelectedIndex;
            //??
            //this.NavigationService.Navigate(new Uri("/MainPage.xaml?curUrl=" + FavoritesListBox.), UriKind.Relative));
        }
    }
    //private void AddToFavorites_Click(object sender, EventArgs e)
    void AddToFavorites_Click(object sender, EventArgs e)
    {
        Favorite favorite = new Favorite();
        favorite.Modified = DateTimeOffset.Now;
        FavoritesList.Value.Insert(0, favorite);
        //FavoritesList.Value.Add("xxxx");
        //FavoritesList.Value.Insert(0, WebBrowser.SourceProperty.ToString());
    }
}

所以这是我的基本实现，尽管我不确定它是否正确，也不确定我必须做些什么来修复它才能正常工作。我遇到了问题，将observaleCollection绑定到Listbox，然后也使用selectionchanged方法，该方法在所选索引处选择收藏夹（及其url），然后使用该url导航回MainPage.xaml？任何帮助都将不胜感激，因为我对c#非常陌生，我不太确定该怎么办。请提供代码帮助，我将不胜感激！！提前非常感谢。