Error window show modal in MVVM WPF

Question

I have implemented my MVVM error message as a message dialog that subscribes to error messages via a mediator class, so that other viewmodels can notify it if any errors occ

Answer 1

In my recent blog post you can find simple solution for Modal Dialogs and Message Boxes in MVVM for Silverlight but this can be simply reused in WPF:

Modal dialogs with MVVM and Silverlight 4