public static DataFacebookFeedsFetcher GetInstance()
 {
     if (_instance == null)
     {
         _instance = new DataFacebookFeedsFetcher();
     }
     return _instance;
 }
        private void ToFacebookFeedsPage2()
        {
            bool isStorageFileExisted = false;

            string storageName = "fbd-channel-fbfeeds";
            using (IsolatedStorageFile f = IsolatedStorageFile.GetUserStoreForApplication())
            {
                isStorageFileExisted = f.FileExists(storageName + ".xml");
            }

            if (isStorageFileExisted)
            {
                storageName = "fbd-localcache-fbfeeds";
                var dataFacebookFeedsFetcher = new DataFacebookFeedsFetcher();
                dataFacebookFeedsFetcher.FetchFeeds(new DataModel.UserToken
                {
                    DataFetchType = storageName,
                    Callback = delegate
                    {
                        Dispatcher.BeginInvoke(() => NavigationService.Navigate(new Uri("/NewsListPage.xaml?storage=" + storageName + "&category=fbfeeds"
                            + "&viewtype=" + PinType.Channel, UriKind.Relative)));
                    }
                }, App.AccessToken);
            }
            else
            {
                storageName = "fbd-localcache-fbfeeds";
                var dataFacebookFeedsFetcher = new DataFacebookFeedsFetcher();
                dataFacebookFeedsFetcher.FetchFeeds(new DataModel.UserToken
                {
                    DataFetchType = storageName,
                    Callback = delegate
                    {
                        Dispatcher.BeginInvoke(() => NavigationService.Navigate(new Uri("/NewsListPage.xaml?storage=" + storageName + "&category=fbfeeds"
                            + "&viewtype=" + PinType.Channel, UriKind.Relative)));
                    }
                }, App.AccessToken);
            }


        }
        private void ToFacebookFeedsPage2()
        {
            
                string storageName = "fbd-localcache-fbfeeds";
                var dataFacebookFeedsFetcher = new DataFacebookFeedsFetcher();
                dataFacebookFeedsFetcher.FetchFeeds(new DataModel.UserToken
                {
                    DataFetchType = storageName,
                    Callback = delegate
                    {
                        Dispatcher.BeginInvoke(() => NavigationService.Navigate(new Uri("/NewsListPage.xaml?storage=" + storageName + "&category=fbfeeds"
                            + "&viewtype=" + PinType.Channel, UriKind.Relative)));
                    }
                }, App.AccessToken);



        }