delete some tags from html document with c#

Answer 1

Usually, I solve this kind of issue via File I/O and RegEx (which is not advised at all to deal with xml/html documents, as the commentators dutifully noted).

That said, if you want to do it properly, I'm pretty sure there's a DOM object in C#.

This one seems to support XPath request, which is pretty handy.

Answer 2

It depends on how complex your HTML is, but you will probably need the Agility Pack library.

Re the Update:

HandleNode() contains a while(node != null) loop but never assigns to node. I would change that to an if(...) to start with.

Answer 3

You're looking for the HTML Agility Pack.

Answer 4

To solve your problem, you can use LINQ:

foreach(var node in doc.DocumentNode
            .Descendants("div")
            .Where(d => d.GetAttributeValue("class", "").IndexOf("NavContent") >= 0)
            .ToArray())
    node.Remove();