XML stream operation

/// <summary>         /// save XML format specified         /// </summary>         /// <param name="XML"></param>         public void Save(string XML)         {             XmlDocument xmldoc = new XmlDocument (); // create an empty XML document              xmldoc.LoadXml (XML);             var file = "F:\\Work\\InternationalTicket\\QingdaoAirSystem\\Utility\\ManageText\\ManageText\\wwwroot\\file\\QHText\\Save.XML";             var filez = "F:\\Work\\InternationalTicket\\QingdaoAirSystem\\Utility\\ManageText\\ManageText\\wwwroot\\file\\QHText";               var files = "F:\\Work\\InternationalTicket\\QingdaoAirSystem\\Utility\\ManageText\\ManageText\\wwwroot\\file\\QHText\\Save.ZIP";             xmldoc.Save(file);             zip(filez, files);             was post = File2Bytes (files);         }         /// <summary>         /// saved as ZIP         /// </summary>         /// <param name="fileName"></param>         /// <param name="compressedFileName"></param>         /// <param name="overrideExisting"></param>         /// <returns></returns>         public void zip(string path,string Topath)         {             try             {                 System.IO.Compression.ZipFile.CreateFromDirectory(path, Topath);             }             catch { }         }         /// <summary>         /// converts files to byte array         /// </summary>         /// <param name = "path"> File Address </ param>         /// <returns> byte array converted </ returns>         public static byte[] File2Bytes(string path)         {             if (!System.IO.File.Exists(path))             {                 return new byte[0];             }             FileInfo fi = new FileInfo(path);             byte[] buff = new byte[fi.Length];             FileStream fs = fi.OpenRead();             fs.Read(buff, 0, Convert.ToInt32(fs.Length));             fs.Close();             return buff;         }