title: PRISM MEF communication from viewmodel to viewmodel by using Eventaggregator in wpf
body: <p>I am trying to create a WPF application by using WPF and PRISM. I am also using MEF and mvvm. Is it possible to have 2 viewmodels that can communicate to each other by using the event aggregastor? Eg. Publish in viewmodel A and subscribe in Viewmodel B? And if so how? I have build a program with multiple viewmodels and some of these viewmodels should communicate with each other, but somehow if I publish in Viewmodel A using a eventaggregator, A subscribe in viewmodel B will never be recognized to belong to the same eventaggregator so that I cannot update my View connected to viewmodel B.</p>