How to Syntax Highlight in a RichTextBox [C#]?

Question

How do I syntax highlight in a richtextbox control AS THE USER TYPES and USING A String[] keywords. I will be publishing a lightweight notepad to the web soon

Answer 1

• RichTextBox syntax highlighting (talks about RichTextBox itself - minimal features but exactly what you asked for here)
• A textbox/richtextbox that has syntax highlighting? [C#] (talks mostly about other ways of doing it)