<?xml version="1.0" encoding="utf-8"?><UpgradeConfig xmlns:xsi="http://www.w3.org/2001/XMLSchema-instance" xmlns:xsd="http://www.w3.org/2001/XMLSchema">  <FileList>    <string>Lighthouse.jpg</string>    <string>Penguins.jpg</string>    <string>Tulips.jpg</string>    <string>UpgradeConfig.xml</string>  </FileList>  <AppVersion>2</AppVersion></UpgradeConfig>

  //升级文件存放的目录        //这个目录的位置是指定的 当然您也可以换个名称        string upgradeFolder = AppDomain.CurrentDomain.BaseDirectory + "UpgradeFile\\";        private UpgradeConfig upgradeConfig = null;        private void button1_Click(object sender, EventArgs e)        {            //如果程序目录不存在UpgradeFile文件夹，则创建升级文件文件夹            ActionHelper.CreateDir(upgradeFolder);            List<string> list = new List<string>();            DirectoryInfo dir = new DirectoryInfo(upgradeFolder);            foreach (FileInfo info in dir.GetFiles())            {                //把文件名称添加到list列表中                //info.FullName.Substring(upgradeFolder.Length)  表示去掉路径 只保留文件名称                list.Add(info.FullName.Substring(upgradeFolder.Length));              }             //给upgradeConfig类赋值            //<1> 给文件列表赋值            upgradeConfig.FileList = list;            //<2>把upgradeConfig类的内容保存成xml文件            upgradeConfig.Save(UPConfigFilePath);            //在窗体上显示一下            listBox1.DataSource = list;            textBox1.Text = upgradeConfig.AppVersion.ToString ();        }         

   [ProtoContract]     public  class UpgradeConfig    {        //文件名称列表         [ProtoMember(1)]                 public List<string> FileList { get; set; }       //应用程序版本号        [ProtoMember(2)]        public int AppVersion { get; set; }        /// <summary>        /// 此处写法主要应对文件列表为空的情况，加上一下代码就不出错了        /// </summary>        [DefaultValue(false), ProtoMember(3)]        private bool IsEmptyList        {            get { return FileList != null && FileList.Count == 0; }            set { if (value) { FileList = new List<string>(); } }        }                //文件保存路径               public UpgradeConfig()        {        }                       //加载配置文件        public static UpgradeConfig LoadConfig(string filePath)        {            XmlSerializer serializer = new XmlSerializer(typeof(UpgradeConfig));            StreamReader sr = new StreamReader(filePath);            UpgradeConfig upgradeConfig = serializer.Deserialize(sr) as UpgradeConfig;            sr.Close();            return upgradeConfig;        }       //保存配置文件         public void Save(string filePath)        {            XmlSerializer serialzier = new XmlSerializer(typeof(UpgradeConfig));            StreamWriter writer = new StreamWriter(filePath);            string tempPath = Path.GetDirectoryName(filePath);            if (!Directory.Exists(tempPath))            {                Directory.CreateDirectory(tempPath);            }            serialzier.Serialize(writer, this);            writer.Close();        }    }

  public static class ActionHelper    {         /// <summary>        /// 确保路径中的目录存在        /// </summary>        /// <param name="spath"></param>        public static void CreateDir(string spath)        {            string path = Path.GetDirectoryName(spath);            if (!Directory.Exists(path))            {                DirectoryInfo directoryInfo = new DirectoryInfo(path);                directoryInfo.Create();            }        }    }