Syntax-highlighting textbox for Winforms, ASP.NET, WPF

Question

I\'m looking for a syntax-highlighting Textbox component, preferably free, with source, and capable of being used in Winforms, ASP.NET and WPF alike. Also, it should support not

Answer 1

All those platforms are completely different and each have their own rendering display methods. So there won't be any universal control that does all. Each platform will have a separate control

However, one can implement a web control and use it in a page. Then a browser object in winforms or wpf can use the page address to display it