ListBoxItem selection on TextBox focus

Question

I have a ListBox showing items using the following DataTemplate:

Answer 1

I found that the answer is just to do this from the ListBoxItem standpoint, adding the following to its DataTemplate:

<Style.Triggers>
  <Trigger Property="IsKeyboardFocusWithin" Value="True">
    <Setter Property="IsSelected" Value="True"/>
  </Trigger>
</Style.Triggers>