Fizzler is an open source (LGPL) CSS Selectors Level 3 engine for Microsoft .NET Framework and Mono platforms.
Fizzler enables applications to select nodes from an arbitrary document system using the CSS Selectors Level 3 syntax. It includes an implementation for selecting nodes of an HTML document using HtmlAgilityPack. There are other sandbox implementations provided as incubations.
Fizzler comes with a GUI front-end, called Visual Fizzler , for interactively selecting parts of an HTML document using CSS selectors:
For command-line junkies, Fizzler also comes with Console Fizzler
fizz.exe), for selecting parts of an HTML document using CSS selectors: