Treeview Problem

You would like to display a context menu right when you right click on Treeview

Place a context menu from the tool box name the items as you like and handle mousedown event for treeview as follows

 private void tvwACH_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Button == MouseButtons.Right)
            {
                if (tvwACH.HitTest(e.Location).Node != null)
                {
                    contextMenu.Show(tvwACH, e.Location);
                }
            }
You should also handle the remaining code as you like when you select the options from Context menu