public string AtomToRssConverter(XmlDocument atomDoc)
        {
            XmlDocument xmlDoc = atomDoc;
            XmlNamespaceManager mgr = new XmlNamespaceManager(xmlDoc.NameTable);
            mgr.AddNamespace("atom", "http://purl.org/atom/ns#");
            const string rssVersion = "2.0";
            const string rssLanguage = "en-US";
            string rssGenerator = "RDFFeedConverter";
            MemoryStream memoryStream = new MemoryStream();
            XmlTextWriter xmlWriter = new XmlTextWriter(memoryStream, null);
            xmlWriter.Formatting = Formatting.Indented;
            string feedTitle = xmlDoc.SelectSingleNode("//atom:title", mgr).InnerText;
            string feedLink = xmlDoc.SelectNodes("//atom:link/@href", mgr)[2].InnerText;
            string rssDescription = xmlDoc.SelectSingleNode
				("//atom:tagline", mgr).InnerText;
            xmlWriter.WriteStartElement("rss");
            xmlWriter.WriteAttributeString("version", rssVersion);
            xmlWriter.WriteStartElement("channel");
            xmlWriter.WriteElementString("title", feedTitle);
            xmlWriter.WriteElementString("link", feedLink);
            xmlWriter.WriteElementString("description", rssDescription);
            xmlWriter.WriteElementString("language", rssLanguage);
            xmlWriter.WriteElementString("generator", rssGenerator);
            XmlNodeList items = xmlDoc.SelectNodes("//atom:entry", mgr);
            if (items == null)
                throw new FormatException("Atom feed is not in expected format. ");
            else
            {
                string title = String.Empty;
                string link = String.Empty;
                string description = String.Empty;
                string author = String.Empty;
                string pubDate = String.Empty;
                for (int i = 0; i < items.Count; i++)
                {
                    XmlNode nodTitle = items[i];
                    title = nodTitle.SelectSingleNode("atom:title", mgr).InnerText;
                    link = items[i].SelectSingleNode("atom:link[@rel='alternate']", 
					mgr).Attributes["href"].InnerText;
                    description = items[i].SelectSingleNode("atom:content", 
							mgr).InnerText;
                    author = items[i].SelectSingleNode("//atom:name", mgr).InnerText;
                    pubDate = items[i].SelectSingleNode("atom:issued", mgr).InnerText;
                    xmlWriter.WriteStartElement("item");
                    xmlWriter.WriteElementString("title", title);
                    xmlWriter.WriteElementString("link", link);
                    xmlWriter.WriteElementString("pubDate", 
			Convert.ToDateTime(pubDate).ToUniversalTime().ToString
			(@"ddd, dd MMM yyyy HH:mm:ss G\MT"));
                    xmlWriter.WriteElementString("author", author);
                    xmlWriter.WriteElementString("description", description);
                    xmlWriter.WriteEndElement();
                }
                xmlWriter.WriteEndElement();
                xmlWriter.Flush();
                xmlWriter.Close();
            }
            XmlDocument retDoc = new XmlDocument();
            string outStr = Encoding.UTF8.GetString(memoryStream.ToArray());
            retDoc.LoadXml(outStr);
            retDoc.Save("c:\\gova.xml");
            memoryStream.Close();
            xmlWriter.Close();
            return outStr;
        }