How to convert treeview to xml?

I am working on a project cur开发者_Python百科rently and I need to convert the treeview to xml so that I can send that xml data to another port.

private void button1_Click(object sender, EventArgs e)
{
    var rootElement = new XElement("root", CreateXmlElement(treeView1.Nodes));
    var document = new XDocument(rootElement);
    document.Save("C:\\1.xml");
}

private static List<XElement> CreateXmlElement(TreeNodeCollection treeViewNodes)
{
    var elements = new List<XElement>();
    foreach (TreeNode treeViewNode in treeViewNodes)
    {
        var element = new XElement(treeViewNode.Name);
        if (treeViewNode.GetNodeCount(true) == 1)
            element.Value = treeViewNode.Nodes[0].Name;
        else
            element.Add(CreateXmlElement(treeViewNode.Nodes));
        elements.Add(element);
    }
    return elements;
}

   Here is the code snippet :

   public void exportToXml(TreeView tv, string filename)
    {
        sr = new StreamWriter(filename, false, System.Text.Encoding.UTF8);
        sr.WriteLine("<" + tv.Nodes[0].Text + ">");
        foreach (TreeNode node in tv.Nodes)
        {
            saveNode(node.Nodes);
        }
        //Close the root node
        sr.WriteLine("</" + tv.Nodes[0].Text + ">");
        sr.Close();
    }

    private void saveNode(TreeNodeCollection tnc)
    {
        foreach (TreeNode node in tnc)
        {

            if (node.Nodes.Count > 0)
            {
                sr.Write("<" + node.Text + ">");
                saveNode(node.Nodes);
                sr.WriteLine("</" + node.Text + ">");
            }
            else
                sr.Write(node.Text);
        }
    }