System.Xml.XmlDocument.GetElementsByTagName C# (CSharp) Method

        public virtual XmlNodeList GetElementsByTagName(String name)
        {
            return new XmlElementList(this, name);
        }

        //Method to take a signed URL and return information contained in the get response
        public static string Fetch(string url)
        {
            string asin = "";
            try {
                //Makes a request, and exports the response into an XML file
                WebRequest request = HttpWebRequest.Create(url);
                WebResponse response = request.GetResponse();
                XmlDocument doc = new XmlDocument();
                doc.Load(response.GetResponseStream());

                //Parse XML document for errors
                XmlNodeList errorMessageNodes = doc.GetElementsByTagName("Message", NAMESPACE);
                if (errorMessageNodes != null && errorMessageNodes.Count > 0) {
                    String message = errorMessageNodes.Item(0).InnerText;
                    string error;

                    MessageBox.Show("Unfortunately, music preview isn't available for this track.");
                    //MessageBox.Show("Error: " + message + " (but signature worked)");

                    return null;
                }

                XmlNode asinNode = doc.GetElementsByTagName("ASIN", NAMESPACE).Item(0);
                if (asinNode != null) asin = asinNode.InnerText;

                return asin;
            }
            catch (Exception e) {
                System.Console.WriteLine("Caught Exception: " + e.Message);
                System.Console.WriteLine("Stack Trace: " + e.StackTrace);
            }

            return null;
        }