Trying to use the Message.Attach syntax in a WinRT XAML app in order to wire events to the view model does not work for events from the AppBar. In general, Message.Attach seems to work, it just doesn't work from the AppBar (at least that's the only issue I've found with it so far).
Sample project illustrating the problem is attached. Run it in the debugger to see messages written to the debug output window.
Comments: This is a WUI issue and it seems to be fixed there already. Problem now: Caliburn.Micro is not compatible with this new WUI version. Please vote for https://caliburnmicro.codeplex.com/workitem/249 to get Caliburn.Micro compatible with the new WUI version.
Sample project illustrating the problem is attached. Run it in the debugger to see messages written to the debug output window.
Comments: This is a WUI issue and it seems to be fixed there already. Problem now: Caliburn.Micro is not compatible with this new WUI version. Please vote for https://caliburnmicro.codeplex.com/workitem/249 to get Caliburn.Micro compatible with the new WUI version.