;       if (skin.Tables[0].Rows[0][0].ToString() == "系统默认")
                {
                    ((ToolStripMenuItem)toolMenu.DropDownItems[toolMenu.DropDownItems.Count - 1]).Checked = true;
                }
            }
            static void frm_Main_Click(object sender, EventArgs e)
            {

                for (int i = 0; i < ((ToolStripMenuItem)((ToolStripMenuItem)sender).OwnerItem).DropDownItems.Count; i++)
                {
                    if (((ToolStripMenuItem)sender).Text == ((ToolStripMenuItem)((ToolStripMenuItem)sender).OwnerItem).DropDownItems[i].Text)
                    {
                        ((ToolStripMenuItem)sender).CheckState = CheckState.Checked;
                        DataSet skin = new DataSet();
                        skin.Tables.Add("skin");
                        skin.Tables["skin"].Columns.Add("style");
                        System.Data.DataRow dr = skin.Tables["skin"].NewRow();
                        dr[0] = ((ToolStripMenuItem)((ToolStripMenuItem)sender).OwnerItem).DropDownItems[i].Text;
                        skin.Tables[0].Rows.Add(dr);
                        skin.WriteXml("skin.xml", XmlWriteMode.IgnoreSchema);