class Program

    {

        private static readonly object obj = new object();

        static void Main(string[] args)

        {

            Thread th1 = new Thread(TestLock);

            Thread th2 = new Thread(TestLock1);

            th1.IsBackground = true;

            th2.IsBackground = true;

            th2.Start();

            th1.Start();

            #region 按任意键继续

            Console.Write("按任意键继续！");

            //此代码会提示用户按任意键，然后在用户按键前暂停程序。

            Console.ReadKey(true);

            #endregion 按任意键继续

        }

        private static void TestLock()

        {

            lock (obj)

            {

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

                {

                    var message = i.ToString();

                    string logFileName = @"F:\Log\" + DateTime.Now.ToString("yyyyMMdd") + "Log" + ".txt";

                    StreamWriter sr = new StreamWriter(logFileName, true);

                    try

                    {

                        sr.WriteLine(message);

                    }

                    catch

                    {

                        Console.WriteLine(message);

                    }

                    finally

                    {

                        sr.Close();

                    }

                }

            }

        }

        private static void TestLock1()

        {

            lock (obj)

            {

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

                {

                    var message = "Count:" + i.ToString();

                    string logFileName = @"F:\Log\" + DateTime.Now.ToString("yyyyMMdd") + "Log" + ".txt";

                    StreamWriter sr = new StreamWriter(logFileName, true);

                    try

                    {

                        sr.WriteLine(message);

                    }

                    catch

                    {

                        Console.WriteLine(message);

                    }

                    finally

                    {

                        sr.Close();

                    }

                }

            }

        }

    }