IIS6

How to check and set password for IUSR_*
http://www.windowsitpro.com/article/passwords/how-can-i-check-the-password-of-the-iusr-and-iwam-local-accounts-on-a-machine--48361

Problem if password for IUSR is not synced between IIS metabase and SAM
http://blogs.msdn.com/b/jiruss/archive/2006/05/24/606107.aspx

Built in users and groups
http://www.iis.net/learn/get-started/planning-for-security/understanding-built-in-user-and-group-accounts-in-iis

.NET XML Serializer

            MemoryStream memoryStream = new MemoryStream();
            XmlSerializer xs = new XmlSerializer(typeof(ConfigState));
            XmlTextWriter xmlTextWriter = new XmlTextWriter(memoryStream, Encoding.UTF8);
            xs.Serialize(xmlTextWriter, cs);
            string configXml = Encoding.UTF8.GetString(memoryStream.ToArray());