In the above link project details is perfectly correct. but in that code i want some changes like . we add the combo box to the treeview . which node is selected in the treeview that node will be displaying to  the combo box .
  1. Hi K V Sunil!

    If you want to populate data into combo box on node selection or on node click, then used _NodeMouseClick event of tree view as below

    private void treeView1_NodeMouseClick(object sender, TreeNodeMouseClickEventArgs e)
    {
        cmbNode.Items.Add(e.Node.Text);
    }

    I hope it resolve your problem

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