动态多语言功能，想用XML文件作为语言包

下面是我的源代码，也是从别的地方copy下来的，自己修改了一些，但是现在有问题啊。
运行的时候可以从xml文件中取出对应的值，但是就是不能显示到对应的button上，怎么回事啊？是不是需要设置什么东西？多谢，
namespace mulLan
{
    public partial class Demo : Form
    {
        public Demo()
        {
            InitializeComponent();
        }
        /*********************** derrick language *****************/
        //read default language
        public static string ReadDefaultLanguage()
        {
            XmlReader reader = new XmlTextReader("resources/LanguageDefine.xml");
            XmlDocument doc = new XmlDocument();
            doc.Load(reader);
            XmlNode root = doc.DocumentElement;
            //select DefaultLangugae node
            XmlNode node = root.SelectSingleNode("DefaultLanguage");

            string result = node.Value;
            if (node != null)
                //get node's context
                result = node.InnerText;

            reader.Close();
            return result;
        }

        //modify default language
        public static void WriteDefaultLanguage(string lang)
        {
            DataSet ds = new DataSet();
            ds.ReadXml("resources/LanguageDefine.xml");
            DataTable dt = ds.Tables["Language"];

            dt.Rows[0]["DefaultLanguage"] = lang;
            ds.AcceptChanges();
            ds.WriteXml("resources/LanguageDefine.xml");
        }

        //read AppConfig.xml file
        public static IList GetLanguageList(string lang)
        {
            IList result = new ArrayList();

            XmlReader reader = new XmlTextReader("resources/AppConfig.xml");
            XmlDocument doc = new XmlDocument();
            doc.Load(reader);

            XmlNode root = doc.DocumentElement;
            XmlNodeList nodelist = root.SelectNodes("Area[Language='" + lang + "']/List/Item");
            foreach (XmlNode node in nodelist)
            {
                result.Add(node.InnerText);
            }
            reader.Close();

            return result;
        }

        /// <summary></summary>
        /// read multi language file
        /// </summary>
        /// <param name="frmName">Form Name</param>
        /// <param name="lang">will display language(zh or en)</param>
        /// <returns></returns>
        public static Hashtable ReadResource(string frmName, string lang)
        {
            Hashtable result = new Hashtable();

            XmlReader reader = null;
            FileInfo fi = new FileInfo("resources/AppResource_" + lang + ".xml");
            if (!fi.Exists)
                reader = new XmlTextReader("resources/AppResource.xml");
            else
                reader = new XmlTextReader("resources/AppResource_" + lang + ".xml");

            XmlDocument doc = new XmlDocument();
            doc.Load(reader);

            XmlNode root = doc.DocumentElement;
            XmlNodeList nodelist = root.SelectNodes("Form[Name='" + frmName + "']/Controls/Control");
            foreach (XmlNode node in nodelist)
            {
                try
                {
                    XmlNode node1 = node.SelectSingleNode("@name");
                    XmlNode node2 = node.SelectSingleNode("@text");
                    if (node1 != null)
                    {
                        result.Add(node1.InnerText.ToLower(), node2.InnerText);
                    }
                }
                catch (FormatException fe)
                {
                    Console.WriteLine(fe.ToString());
                }
            }
            reader.Close();
            return result;
        }

        public static void getNames(Form form)
        {
            //Hashtable table = AppConfig.ReadResource(form.Name,Global.GetValue("lang").ToString());
            Hashtable table = ReadResource(form.Name, "ZH");
            Control.ControlCollection controlNames = form.Controls;
            try
            {
                foreach (Control control in controlNames)
                {
                    if (control.GetType() == typeof(System.Windows.Forms.Panel))
                        GetSubControls(control.Controls, table);

                    if (control.GetType() == typeof(System.Windows.Forms.GroupBox))
                        GetSubControls(control.Controls, table);

                    if (table.Contains(control.Name.ToLower()))
                        control.Text = (string)table[control.Name.ToLower()];
                   
                }
                if (table.Contains(form.Name.ToLower()))
                    form.Text = (string)table[form.Name.ToLower()];
            }
            catch (Exception ex)
            {
                Console.WriteLine(ex.ToString());
            }
        }

        private static void GetSubControls(Control.ControlCollection controls, Hashtable table)
        {
            foreach (Control control in controls)
            {
                if (control.GetType() == typeof(System.Windows.Forms.Panel))
                    GetSubControls(control.Controls, table);

                if (control.GetType() == typeof(System.Windows.Forms.GroupBox))
                    GetSubControls(control.Controls, table);

                if (table.Contains(control.Name.ToLower()))
                    control.Text = (string)table[control.Name.ToLower()];
            }
        }

        /*********************** end derrick language *****************/
        private void Demo_Load(object sender, EventArgs e)
        {
            IList list;
            //Hashtable resourceFile;
            Demo form = new Demo();

            string Language;

            Language = ReadDefaultLanguage();
            list = Demo.GetLanguageList(Language);
            comLanguage.DataSource = list;
            comLanguage.Text = Language;

            getNames(form);
        }

        private void Default_Click(object sender, EventArgs e)
        {
            int strB;
            string Language;
            Language = comLanguage.Text;
            strB = Language.IndexOf('[');
            Language = Language.Substring(strB + 1, 2);
            Demo.WriteDefaultLanguage(Language);
        }
    }
}