public class LogContent

    {

        public LogContent()

        {

           

        }

        public LogContent(string msg)

        {

            this.Message = msg;

        }

        private string mssage;

        public string Message

        {

            get;

            set;

        }

    }

public static class FileQueueManager

    {

        private static object lockHelper = new object();

        static Thread workerThread;

        static FileQueueManager()

        {

            workerThread = new Thread(new ThreadStart(Run));

            workerThread.Start();

        }

        private static Queue<LogContent> logMessageQueue = new Queue<LogContent>();

        public static void Write(LogContent log)

        {

            lock (lockHelper)

            {

                logMessageQueue.Enqueue(log);

            }

        }

        public static int QueueCount

        {

            get { return logMessageQueue.Count; }

        }

        private static void Run()

        {

            lock (lockHelper)

            {

                Write(new LogContent() { Message = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff") });

            }

            LogContent log;

            while (true)

            {

                try

                {

                    if (logMessageQueue.Count > 0)

                    {

                        Write();

                        lock (lockHelper)

                        {

                            logMessageQueue.Dequeue();

                        }

                    }

                    else

                        break;

                    Thread.Sleep(1000);

                }

                catch (Exception ex)

                {

                }

            }

        }

        private static void Write()

        {

            string logdir;

            //logdir = System.Web.HttpContext.Current.Server.MapPath(logFileName);

            logdir = @"d:\a.log";

            try

            {

                System.IO.StreamWriter sw = new System.IO.StreamWriter(logdir, true);

                sw.BaseStream.Seek(0, System.IO.SeekOrigin.End);

                sw.WriteLine("[" + DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss") + ":" + DateTime.Now.Millisecond + "]" + workerThread.ManagedThreadId + "");

                sw.Flush();

                sw.Close();

            }

            catch (Exception e)

            {

            }

        }

    }

private static void ThreadQueueTest()

        {

            for (int i = 0; i < 100; i++)

                FileQueueManager.Write(new LogContent() { Message = DateTime.Now.ToString("yyyy-MM-dd HH:mm:ss fff") });

            System.Console.WriteLine(FileQueueManager.QueueCount);

        }