protected override void OnNavigatedTo(NavigationEventArgs e)
 {
   item = (TweetClass.TweetInfo)e.Parameter;
   if (item != null)
   {
     //tweetState.Text = e.Content.ToString();
     userBlock.Text = "Reply to " + item.ScreenName;
     this.tweetInputBox.Text = item.ScreenName + " ";
   }
   else
   {
     userBlock.Text = "What's happen?";
   }
 }
    protected override void OnNavigatedTo(NavigationEventArgs e)
    {
      item = (TweetClass.TweetInfo)e.Parameter;
      //replyBox.Text = item.ToString();
      //show();
      loadTweet(item.Id);

    }
 protected override void OnNavigatedTo(NavigationEventArgs e)
 {
   item = (TweetClass.TweetInfo)e.Parameter;
 }