public static TreeNode Process(TreeNode treeNode)
{
treeNode.CreateNodeList();
switch(treeNode.Nodes.Count)
{
case 0:
return null;
case 1:
var node = treeNode.Nodes[0];
node.Text = treeNode.Text + " \\ " + node.Text;
return Process(node);
}
return treeNode;
}