Can't set focus to a child of UserControl

Question

I have a UserControl which contains a TextBox. When my main window loads I want to set the focus to this textbox so I added Focusable=\"True

Answer 1

Assuming you want to set focus for Username textbox, thus user can type in directly every time it shows up.

In Constructor of your control:

this.Loaded += (sender, e) => Keyboard.Focus(txtUsername);