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protected void TreeView1_SelectedNodeChanged(object sender, EventArgs e)
{
    MyLabel.Text = TreeView1.SelectedNode.ToolTip;
}
 
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protected void TreeView1_TreeNodeCollapsed(object sender, TreeNodeEventArgs e)
{
    MyLabel.Text = "You collapsed the " + e.Node.Value + " node.";
}
protected void TreeView1_TreeNodeExpanded(object sender, TreeNodeEventArgs e)
{
    MyLabel.Text = "You expanded the " + e.Node.Value + " node.";
}
 
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