class LogManager{ static object locker = new object(); /// <summary> /// 重要信息寫入日志 /// </summary> /// <param name="logs">日志列表，每條日志占一行</param> public static void WriteProgramLog(params string[] logs) {  lock (locker)  {   string LogAddress = Environment.CurrentDirectory + "http://Log";   if (!Directory.Exists(LogAddress + "http://PRG"))   {    Directory.CreateDirectory(LogAddress + "http://PRG");   }   LogAddress = string.Concat(LogAddress, "http://PRG//",    DateTime.Now.Year, '-', DateTime.Now.Month, '-',    DateTime.Now.Day, "_program.log");   StreamWriter sw = new StreamWriter(LogAddress, true);   foreach (string log in logs)   {    sw.WriteLine(string.Format("[{0}] {1}", DateTime.Now.ToString(), log));   }   sw.Close();  } }}