WPF: How to programmatically remove focus from a TextBox

Question

I want to add a simple (at least I thought it was) behaviour to my WPF TextBox.

When the user presses Escape I want the TextBox he is editi

Answer 1

Since none of the above answers worked for me and the accepted answer does work only for a keyboard focus, I came to the following approach:

// Kill logical focus
FocusManager.SetFocusedElement(FocusManager.GetFocusScope(textBox), null);
// Kill keyboard focus
Keyboard.ClearFocus();

Kills both, logical as well as the keyboard focus.