[C#] treeView 더블클릭 트리 펴지는거(Expand) 막기

bool treeCanExpand = false;

        private void treeView_BeforeCollapse(object sender, TreeViewCancelEventArgs e)
        {
            if (treeCanExpand == true && e.Action == TreeViewAction.Collapse)
                e.Cancel = true;
        }

        private void treeView_BeforeExpand(object sender, TreeViewCancelEventArgs e)
        {
            if (treeCanExpand == true && e.Action == TreeViewAction.Expand)
                e.Cancel = true;
        }

        private void treeView_MouseDown(object sender, MouseEventArgs e)
        {
            if (e.Clicks > 1)
                treeCanExpand = true;
            else
                treeCanExpand = false;
        }


출처 : http://stackoverflow.com/questions/1249312/disable-expanding-after-doubleclick