How do I maintain RichText formatting (bold/italic/etc) when changing any one element?

Question

I have a rich text box that may contain a string that has elements of bold, italics, or even different fonts and sizes. If I select the entire string, including all of the d

Answer 1

if you want to apply more FontStyle's on the same text you can use bitwise operators | and ~ | adds a new style and ~ removes an existing style for example

Font aFont=new Font(aPrototypeFont, anotherFont.Style | FontStyle.Bold);