BSky.Lifetime.XMLitemsProcessor.AddXMLItem C# (CSharp) Метод

        public void AddXMLItem(string item)
        {

            //check if duplicate//
            if (IsDuplicateInXml(item))
            {
                RemoveXMLItem(item);//remove duplicate item. later add it so that it will be (move) up on the list
            }
            //no duplicate. open XML for writing. Add to list //
            XmlDocument xd = new XmlDocument();
            try
            {
                xd.Load(XMLFilename);//root element must exist in xml file
            }
            catch (Exception ex)
            {
                logService.WriteToLogLevel("Error adding XML entry in " + XMLFilename, LogLevelEnum.Error);
                logService.WriteToLogLevel(ex.Message, LogLevelEnum.Error);
            }
            ///get root element
            XmlNode xn = xd.SelectSingleNode("//recent");
            //if (xn == null)//if there is no <recent> tag
            //{
            //    XmlNode rootNode = xd.CreateElement("recent");
            //    xd.AppendChild(rootNode);
            //}

            //check if MaxItems is reached. if yes then remove last item then add new
            XmlNodeList xnlst = xd.GetElementsByTagName("item");
            if (xnlst.Count == MaxItems)
            {
                xn.RemoveChild(xn.LastChild);
            }

            //Add new Node//
            XmlNode itemnode = xd.CreateElement("item");
            itemnode.InnerText = item;
            xn.InsertBefore(itemnode, xn.FirstChild);//insert on top
            xd.Save(XMLFilename);

            //Refesh
            RefreshXMLItems();

        }