Answer by Graham Dunnett

The Windows Phone support for XML can be read here: http://msdn.microsoft.com/en-us/library/windowsphone/develop/system.xml(v=vs.105).aspx Note that on WP8 and WSA Unity uses MS .Net and not Mono, so the features that are supported can differ compared to platforms where Mono is used. Use the Microsoft documentation for Windows Phone to learn how to use c# features and classes.