多线程中资源同步的示例

private static void SaleTicketThread1()
        {
            while (true)
            {
                try
                {
                    Monitor.Enter(obj);//加锁
                    Thread.Sleep(1);
                    if (tickets > 0)//tickets为多个线程的共用资源
                    {
                        Thread.Sleep(500);
                        Console.WriteLine("线程1出票：" + tickets--);
                    }
                    else
                        break;
                }
                finally
                {
                    Monitor.Exit(obj);//解锁，必须，否则可能死锁
                }
            }
            
        }