c#新手关于菜单问题

Question

        private void Form1_Load(object sender, EventArgs e)
        {
            StreamReader   sr = new StreamReader ("\\menu1.ini");
            int i = this.打开ToolStripMenuItem.DropDownItems.Count - 2;
            while (sr.Peek() >= 0)
            {
                ToolStripMenuItem menuitem = new ToolStripMenuItem(sr.ReadLine());
                this.打开ToolStripMenuItem.DropDownItems.Insert(i,menuitem );
                i++;
                menuitem.Click += new EventHandler(menuitem.Click ) ;            }
            sr.ReadToEnd();}        private void 打开ToolStripMenuItem_Click(object sender, EventArgs e)
        {
            openFileDialog1.FileName = "";
            this.openFileDialog1.ShowDialog();
            StreamWriter  s =new StreamWriter ("\\menu1.ini");
            s.WriteLine (openFileDialog1.FileName);        }
    }
我是c#新手，这是一个菜单打开和关闭，打开.TXT文件在菜单上有显示，我对C#函数和方法不熟悉，有没有高手帮忙改一下,最好能加点注释，方便学习，谢谢