treeview to xml

[alecomo]

hi all!
i have a big big problem with my program...
i want to export a treeview to an xml file...
all is quite simple but when i try to export some kind of nodes i find a lot of problems...
my treeview is structured like this:
manifest (it can be only 1)
->orgs (1)
->org (1...n)
for export manifest node and orgs node i dont find any problem
if i try to export the org node i have too much problems!!
i need a recursional function that iterate through org nodes and recursively add them to the xml file...
here is my code
please help meee!!
tnx to all

private void saveNode2(TreeNodeCollection tnc)
{
foreach (TreeNode node in tnc)
{
if (node.Nodes.Count > 0)
{
if (node.Text == "organizations")
{

xr.WriteStartElement(node.Text);
xr.WriteStartAttribute("default_organization");
xr.WriteValue(orgs.p_default_organization);
xr.WriteEndAttribute();
saveNode2(node.Nodes);
xr.WriteEndElement();

}

else if (node.Text == "organization")
{
xr.WriteStartElement(node.Text);
xr.WriteStartAttribute("id_organization");
xr.WriteValue(org.p_id_organization);
xr.WriteEndAttribute();
xr.WriteStartAttribute("struct_organization");
xr.WriteValue("hierarchical");
xr.WriteEndAttribute();
xr.WriteElementString("title", org.p_title_organization);
saveNode2(node.Nodes);
xr.WriteEndElement();
}
}
HELP!!