文件操作

   static void Main(string[] args)
        {
            XmlDocument doc = new XmlDocument();
            doc.Load("./XML.xml");

            XmlElement rootElement = null;

            XmlNodeList nodeList = doc.SelectNodes("bookstore/book/title");

            foreach (XmlNode itemNode in nodeList)
            {
                Console.WriteLine(itemNode.InnerText);
            }


            rootElement = doc.DocumentElement;

            XmlNodeList bookNodeList = rootElement.SelectNodes("book");

            foreach (XmlNode xmlnode in bookNodeList)
            {
                if (!xmlnode.HasChildNodes)
                {
                    Console.WriteLine(xmlnode.InnerText);
                }
                else
                {
                    XmlNode titlenode = xmlnode.SelectSingleNode("title");
                    Console.WriteLine(titlenode.InnerText);

                }
            }

            Console.ReadLine();

 class FileDemo
    {
        //public static void Main(string[] args)
        //{
        //    string path = @"d:1.txt";
        //    string content = "www.zklve.com" + DateTime.Now.ToString();
        //    if (Directory.Exists(path))
        //    {
        //        Directory.CreateDirectory(path);
        //    }

        //    //写入文件内容
        //    File.WriteAllText(path, content);

        //    //文件copy              
        //    string sourcePath = @"d:2.zip";
        //    string desPath = @"e:2.zip";
        //    File.Copy(sourcePath, desPath);
        //}

     public static void Main()
        {
            string[] strArr = new string[5] { "1", "1", "1", "1", "1", };

            string path = @"d:2.zip";

            //要写入的流
            Stream s = new FileStream(path, FileMode.Open);
            byte[] butter = new byte[s.Length];//缓冲区
            s.Read(butter, 0, butter.Length);//读取工作

            //写入准备
            string desPath = @"e:3.zip";
            FileStream fs = new FileStream(desPath, FileMode.Create);
            fs.Write(butter,0,butter.Length);
            fs.Flush();
            fs.Close();
            s.Flush();
            s.Close();