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Take advantage of Portable Class Libraries 4.5
With Microsoft making big gains to support MVVM in the Portable Class Libraries, will Prism 4.5 be designed to take advantage of this?
For example, when creating a view-model class you'd extend from the NotificationObject abstract class. But, unless the NotificationObject class is in its own Portable Class Library then this would be impossible (you can't reference a standard .NET class library).
I guess I'm just asking which, if any, classes will be moved into a Portable Class Library instead of a standard .Net 4.5 class library. My suggestion would be to move as much as we can into a Portable Class Library.