private void RefreshButton_Tap(object sender, System.Windows.Input.GestureEventArgs e)
{
var button = sender as Button;
var subreddit = button.DataContext as TypedThing<Subreddit>;
if (subreddit != null)
Messenger.Default.Send<RefreshSubredditMessage>(new RefreshSubredditMessage { Subreddit = subreddit });
}