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

You find an example how windows (don't matter if they are modal or not) are shown, in the ViewModel example of this project:

WPF Application Framework (WAF)

http://waf.codeplex.com