I've just upgrade to VS2013 update 2, and found out that WP8.1 now has 2 version: silverlight app ( upgraded from WP8 app) and "windows metro" app , is it true? that's a bit confused @@
And when i tested the new "windows metro" (or "universal" app), I see that this kind of framework doesn't use Isolated Storage ( System.IO.IsolatedStorage) like WP8 app, so any alternative for this ?