Some research and H.B. guided me to the right answer, which is setting the following properties:
<TextBlock LineStackingStrategy="BlockLineHeight"
LineHeight="20"/> <!-- Or some other value you fancy. -->
Some research and H.B. guided me to the right answer, which is setting the following properties:
<TextBlock LineStackingStrategy="BlockLineHeight"
LineHeight="20"/> <!-- Or some other value you fancy. -->