The January/February 2014 issue of CODE Magazine is up on the CODE Magazine site. This issue focuses on mobile development. There are a couple of Xamarin flavored articles in this issue, including one that I wrote. I did an article on cross platform localization for mobile apps and you can read it here. The source code is available here.
You’ll want to jump to that article to see how to handle multiple languages and locales with code shared across Windows Phone, iOS, and Android. All in C#.