How to Parse HTML in C# with AngleSharp and Html Agility Pack
Replaced incomplete snippets and broad speed claims with a runnable CSS/XPath extraction example, captured JSON and explicit failure controls. The evidence packet records the tested versions and limits.
To parse HTML in C#, use an HTML parser to build a document, select the elements you need, then convert their text and attributes into validated records. AngleSharp provides CSS selectors and a DOM-style API; Html Agility Pack provides XPath selection. The right starting point is usually the selector language your application already uses.
This tutorial extracts the same product records with both libraries. It covers relative URLs, encoded text, selectors that match nothing and records with missing fields. The example parses HTML already supplied to the application; fetching a page and executing its JavaScript are separate steps.
