What is the best way to implement syntax highlighting?

Question

WPF

I am finishing the old project, it has the ability to write small automation scripts. Currently, a simple text field is used to enter them. I would like to refine it, make a normal editor with highlighting of keywords, parameters, etc. I used to do something similar with RichTextBox, but I thought maybe progress has made some progress since then.
Or is it necessary to cut a separate Renderer for this?

Answer 1

AvalonEdit
Or Ok Google --> "wpf syntax highlighter"