System.Xml.XmlDocument doc = new System.Xml.XmlDocument();
doc.Load(Server.MapPath("App_Data/Setup.Xml"));
System.Xml.XmlNodeList nodes = doc.SelectNodes("/setup/xx/KIND");

            for (int i = 0; i < nodes.Count; i++)
            {

               nodes[i].Attributes["data"].Value;
               nodes[i].Attributes["returnvalue"].Value
                
            }