c# 写txt

public static void WriteErrorLogDataInteraction(string sLog, string titleLog)
        {
            try
            {
                string logPath = ConfigurationSettings.AppSettings["LogPath"]; //通过配置文件记录错误日志位置
                if (string.IsNullOrEmpty(logPath))
                {
                    logPath = System.AppDomain.CurrentDomain.SetupInformation.ApplicationBase;//配置文件安装目录
                }
                DateTime dt = DateTime.Now;
                string logfile = new StringBuilder(logPath).Append(DateTime.Now.ToString("yyyy-MM")).Append(".txt").ToString();
                if (!System.IO.Directory.Exists(System.IO.Path.GetDirectoryName(logfile)))
                {
                    System.IO.Directory.CreateDirectory(System.IO.Path.GetDirectoryName(logfile));
                }
                if (!File.Exists(logfile))
                {
                    FileStream fs = System.IO.File.Create(logfile);
                    fs.Close();
                }
                using (StreamWriter sw = new StreamWriter(logfile, true))
                {
                    sw.WriteLine(DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ":");
                    sw.WriteLine("Title: " + titleLog);
                    sw.WriteLine("Message:" + sLog);
                    sw.WriteLine();
                    sw.Close();
                }
            }
            catch
            { }
        }

方式二、

string a = rea.ToString();

        StreamWriter bb = new StreamWriter("c:\\bbb.xml");

        bb.Write(a);

        bb.Close();