How do I validate a html file with C#?

Question

I have a C# application that receives an html file. I want to parse and validate it. On output it will return a list of errors or that my html is valid.

Has anyone

Answer 1

There is an obscure DLL in the framework version 1.0 (!) Microsoft.mshtml.dll and that is the only way in the framework to deal with DOM. If HTML is XHTML and a valid XML, then you can use XML but otherwise this is the only chance.

Answer 2

I'd run a local instance of the W3C Markup Validation service and communicate with it via the API

Answer 3

You can use HTML Tidy. There is a wrapper for .NET called TidyManaged