In WP8, I can set up a view and use a few SortDescriptions and I have view several my data in a sorted format. Not so with a universal app. The answer I received from the forums is that:
Universal apps are based on WinRT, not Silverlight. As you can see in the relevant APIs:
Windows.UI.XAML.Data.CollectionViewSource does not have a SortDescriptions property.
System.Windows.Data.CollectionViewSource does have a SortDescriptions property.
So, it appears UAs have taken a step back from phone apps. Sorting, something that should be standard, does not exists.
John Marshall… Visio MVP Visio.MVPs.org