High5 is a spec-compliant HTML parser .NET Standard library. It parses HTML the way the latest version of your browser does.
High5 was born by porting parse5, which is in JavaScript, to C#.
High5's parser is generic. It can work with any tree model for an HTML document. A default model implementation is supplied that builds a read-only tree of HTML nodes.
Parse an HTML document:
var html = await new HttpClient().GetStringAsync("http:https://www.example.com/");
var document = Parser.Parse(html);Parse an HTML document fragment:
var html = @"
<div>
<h1>Example Domain</h1>
<p>This domain is established to be used for illustrative examples
in documents. You may use this domain in examples without prior
coordination or asking for permission.</p>
<p><a href='http:https://www.iana.org/domains/example'>More information...</a></p>
</div>";
var fragment = Parser.ParseFragment(html, null);