HTML Diff Component for .NET

Is anyone aware of a good managed code .NET component which can do HTML Diffs? I'd like to compare two HTML files and show the differences.

From stackoverflow Nissan Fan

• Microsoft has a managed-code tool called XmlDiffPatch, which should work for HTML files as well. You can run it as a stand-alone executable, or import the diff assemblies into your project.

  Noldorin : It would only work well for valid XHTML, I'd bet.

  Andy Mikula : XML != XHTML...
  From Steve Guidi