Can you point us to the exact demo you are looking at ? Is it an ORM / ASP Demo, are you sure it is 100% compatible with WPF ? I managed to reproduce this but my ViewModel's constructor is not even fired when I switch to design time. On a side note, please consider having visuals (InformationLayer) in ViewModel a bad practice. Usually MVVM pattern should separate Views, Data (Models) and ViewModels. When you have visuals in the ViewModels you couple the View and the ViewModel.
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