private void treeView1_MouseDown(object sender, System.Windows.Forms.MouseEventArgs e)
{
if(e.Button == MouseButtons.Right)
{
treeView1.SelectedNode = treeView1.GetNodeAt (e.X ,e.Y );
}
}
{
if(e.Button == MouseButtons.Right)
{
treeView1.SelectedNode = treeView1.GetNodeAt (e.X ,e.Y );
}
}
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