Treeview control in windows forms

Well, you can populate the other treeviews from the orginal doing something like this:

            TreeNode tn1 = new TreeNode("Animals");
            TreeNode tn2 = new TreeNode("Plants");
            TreeNode tn3 = new TreeNode("Minerals");

            treeView1.Nodes.Add(tn1);
            treeView1.Nodes.Add(tn2);
            treeView1.Nodes.Add(tn3);

            foreach(TreeNode tn in treeView1.Nodes)
            {
                TreeNode tnNew = (TreeNode)tn.Clone();
                treeView2.Nodes.Add(tnNew);

                TreeNode tnNew2 = (TreeNode) tn.Clone();
                treeView3.Nodes.Add(tnNew2);
            }