ArrayList adding item

[darwen]

To fix your original problem :

foreach (HtmlAgilityPack.HtmlNode node in rowNodes)
{
    string url_1 = node.InnerText;
    urlpool0 = new ArrayList(); // problem is here ! creating a new list every time around the loop
    urlpool0.Add(url_1);              
}

You're creating a new instance of the array list for each iteration through the loop.

Do this instead :

urlpool0 = new ArrayList();
foreach (HtmlAgilityPack.HtmlNode node in rowNodes)
{
    string url_1 = node.InnerText;
    urlpool0.Add(url_1);              
}

As a note you should be using List<string> instead of ArrayList. This is the recommended dynamically sizing list class as of .NET 2.0. ArrayList is a 1.1 collections object.

Darwen.