private static object s_lock = new object();        public static void TraceLog(string message, string logFileName, string logPath = null)        {            string tmppath = string.Empty;            if (logPath != null && logPath.Length > 0)                tmppath = logPath;            else                tmppath = AppDomain.CurrentDomain.BaseDirectory + "\\Log\\";            if (!Directory.Exists(tmppath))            {                Directory.CreateDirectory(tmppath);            }            lock (s_lock)            {                StreamWriter myFile = null;                try                {                    myFile = new StreamWriter(tmppath + DateTime.Now.ToString("yyyyMMdd") + logFileName.ToString() + ".log", true, Encoding.Default);                    TextWriterTraceListener textL = new TextWriterTraceListener(myFile);                    DefaultTraceListener defL = new DefaultTraceListener();                    if (Trace.Listeners.IndexOf(textL) == -1)                    {                        Trace.Listeners.Clear();                        Trace.Listeners.Add(textL);                        Trace.Listeners.Add(defL);                    }                    Trace.AutoFlush = true;                    Trace.WriteLine(string.Empty);                    Trace.WriteLine(message);                }                catch (Exception ioe)                {                    Console.WriteLine(ioe.Message);                }                finally                {                    if (myFile != null)                    {                        myFile.Close();                        myFile.Dispose();                    }                }            }        }