How do I change RichTextBox paragraph spacing?

Question

I am using a RichTextBox in WPF, and am trying to set the default paragraph spacing to 0 (so that there is no paragraph spacing). While I could do this in XAML, I would lik

Answer 1

For me on VS2017 in WPF works this:

The key is Block.LineHeight="2"

You can found this also in Properties view but you can't change below 6px from there.