Set focus on TextBox in WPF from view model

Question

I have a TextBox and a Button in my view.

Now I am checking a condition upon button click and if the condition turns out to be false, displ

Answer 1

I use WPF / Caliburn Micro a found that "dfaivre" has made a general and workable solution here: http://caliburnmicro.codeplex.com/discussions/222892