// Delete the clicked node.
private void ctxNodeDelete_Click(object sender, EventArgs e)
{
if (MessageBox.Show("Are you sure you want to delete node " +
SelectedNode.Name + "?",
"Delete Node?", MessageBoxButtons.YesNo,
MessageBoxIcon.Question) == DialogResult.Yes)
{
// Delete the node (and its subtree).
Root.DeleteNode(SelectedNode);
// Rearrange the tree to show the new structure.
ArrangeTree();
// Show the tree's traversals.
ShowTraversals();
}
}