Linq方法实现TreeViewToXml

 #region Linq方法实现TreeViewToXml
        //保存
        private void SaveTOXml()
        {
            XDeclaration dec = new XDeclaration("1.0", "utf-8", "yes");
            XDocument xml = new XDocument(dec);

            XElement root = new XElement("Tree");

            foreach (TreeNode node in treeView1.Nodes)
            {
                XElement e = CreateElements(node);
                root.Add(e);
            }
            xml.Add(root);
            xml.Save(mf.DirXml + @"\Nav.xml");
        }

        private XElement CreateElements(TreeNode node)
        {
            XElement root = CreateElement(node);
            foreach (TreeNode n in node.Nodes)
            {
                XElement e = CreateElements(n);
                root.Add(e);
            }
            return root;
        }

        private XElement CreateElement(TreeNode node)
        {
            if (node.Tag == null)
            {
                return new XElement("Site",
               new XAttribute("Name", node.Name),
               new XAttribute("Text", node.Text),
               new XAttribute("ImageIndex", node.ImageIndex),
               new XAttribute("SelectedImageIndex", node.SelectedImageIndex),
               new XAttribute("Link", ""));
            }
            else
            {
                return new XElement("Site",
              new XAttribute("Name", node.Name),
              new XAttribute("Text", node.Text),
              new XAttribute("ImageIndex", node.ImageIndex),
              new XAttribute("SelectedImageIndex", node.SelectedImageIndex),
              new XAttribute("Link", node.Tag));
            }

        }
        #endregion