private void ShareButtonClick(object sender, EventArgs e)
{
var twitterUserQuery = new TwitterUserQuery();
var twitterUser = twitterUserQuery.Get();
if (twitterUser == null)
{
NavigationService.Navigate(new Uri("/TwitterAuthentication.xaml", UriKind.Relative));
return;
}
NavigationService.Navigate(new Uri("/TweetPhoto.xaml", UriKind.Relative));
}
