保存日志操作磁盘文件

  //写日志
                System.IO.FileStream fs = new System.IO.FileStream("E:\\log.txt", System.IO.FileMode.Append);
                System.IO.StreamWriter sw = new System.IO.StreamWriter(fs, System.Text.Encoding.Default);
                sw.WriteLine(DateTime.Now.ToString() + "'\t'" + guid.ToString() + "'\t'" + sbEncryptKey + "'\t'" + "'\r\n'");
                sw.Close();
                fs.Close();