C# to HTML Converter with syntax highlighting/colouring ver. 3.2.0.
Paste some C# code (it doesn't have to be working/valid code) and give it a try!
Or try it on some GitHub's repo: https://csharp-colors.xyz/GitHub
Source Code: https://github.com/Swiftly1/CsharpToColouredHTML
Use Iframe -
Lines Highlighting: