A library for comparing two HTML files/snippets and highlighting the differences using simple HTML.
This HTML Diff implementation is a C# port of the ruby implementation found here.
Grab the latest stable version from Nuget: https://www.nuget.org/packages/htmldiff.net/
I have put together a blog post covering how to use the library. A simple demo is included with the solution.
The project used to be hosted in CodePlex and has since been migrated here.