vs2005 menuStrip 2 级遍历

 private void init()
        {
            foreach (ToolStripItem item in menuStrip1.Items)
            {
                if (item is ToolStripMenuItem)
                {

                    //ToolStripDropDown tsd = (item as ToolStripMenuItem).DropDownItems;

                    ToolStripMenuItem tsd = (item as ToolStripMenuItem);

                    for (int i = 0; i < tsd.DropDownItems.Count; i++)
                    {
                        if (tsd.DropDownItems[i] is ToolStripMenuItem)
                        {
                            tsd.DropDownItems[i].Text = i.ToString();
                        }
                    }
                }
            }
        }