public void AddFavorite(Favorite favorite)
 {
     List<Favorite> favorites = null;
     if (!IsolatedStorageSettings.ApplicationSettings.TryGetValue<List<Favorite>>("Favorites", out favorites))
     {
         favorites = new List<Favorite>();
     }
     favorites.Add(favorite);
     IsolatedStorageSettings.ApplicationSettings["Favorites"] = favorites;
 }
 public void RemoveFavorite(Favorite favorite)
 {
     List<Favorite> favorites = null;
     if (IsolatedStorageSettings.ApplicationSettings.TryGetValue<List<Favorite>>("Favorites", out favorites))
     {
         favorites.Remove(favorite);
     }
 }