reading an xml file in c# from a web server

I can read the file. from the web server. The problem I'm having is reading the contents of the xml file. I wish msdn.com forums was easy to find what forum I need. So I know this is not in the right forum.

I keep getting a cashing error. I know what that is, I just don't know how to fix it.

for some reason it errors out. my code is below.

try
            {
                xmlDoc.Load(url);
            }
            catch (XmlException ee)
            {
                MessageBox.Show(ee.Message,Application.ProductName);
                return;
            }
            //System.Xml.XmlNodeList NodeList = xmlDoc.GetElementsByTagName("admin");

            foreach (XmlNodeList NodeList in xmlDoc.GetElementsByTagName("admin")) // This is where the error is
            {
                string alias = NodeList[0].FirstChild.ChildNodes[0].InnerText;
                string real = NodeList[0].FirstChild.ChildNodes[1].InnerText;
                string auth = NodeList[0].FirstChild.ChildNodes[2].InnerText;

                if (real == RealName)
                {

                    if (auth == "Approved")
                    {
                        break;
                    }
                    else
                    {

                        MessageBox.Show("Your are not allowed admin access?",Application.ProductName);
                        //Properties.Settings.Default.AdminOn = false;
                        //Properties.Settings.Default.AdminCode = "";
                        //Properties.Settings.Default.Save();
                        //this.Close();
                    }
                }                

I added the exception error below.

System.InvalidCastException was unhandled
  HResult=-2147467262
  Message=Unable to cast object of type 'System.Xml.XmlElement' to type 'System.Xml.XmlNodeList'. 

Pro-Forums
Delta Force Barracks
On the Frontlines