Will be a short post 🙂 Have just a few spare minutes.
In the example i bind appbar on PaymentStatus of my Order, but sometimes it makes sense to bind appbar on SelectedIndex of Pivot/Panorama.
GenericConverter is a nice converter that is quite usefull to implement different views depending on some enums on numbers or strings. Actually it is a bit error-prone and should be used carefully. In complex cases it is better to write specific controls.