This kind of code:

    HtmlDocument doc = new HtmlDocument();
    doc.Load(myHtmlFile);
    foreach (HtmlNode node in doc.DocumentNode.SelectNodes(
        "//div[@class='list3' and position() > 2 and position() < 6]/a[@class='href1']"))
    {
        Console.WriteLine("node:" + node.InnerText);
    }

will give you this result:

node:A3
node:A4
node:A5