WPF App loses completely focus on window close

Question

Problem description

If I make a non-modal window as a child window through setting the Owner of the window to a parent window, and then show a Messa

Answer 1

it is possible to write your own messagebox, you can implement it as a floater the disable entire screen when showed.

you check the caliburn mvvm frameork sample, there is a nice implementation of messagebox as service.