C#死锁

        class Program
        {
            static void Main(string[] args)
            {
                object lock1 = new object();
                object lock2 = new object();

                new Thread(() => LockTooMuch(lock1, lock2)).Start();

                lock (lock2)
                {
                    Thread.Sleep(1000);
                    Console.WriteLine("Monitor.TryEnter allows not to get stuck,returning false after a specified timeout is elapsed");
                    if (Monitor.TryEnter(lock1, TimeSpan.FromSeconds(5)))
                    {
                        Console.WriteLine("Acquired a protected resource succesfully");
                    }
                    else
                    {
                        Console.WriteLine("Timeout acquiring a resource!");
                    }
                }
                new Thread(() => LockTooMuch(lock1, lock2)).Start();

                Console.WriteLine("----------------------------------");
                lock (lock2)
                {
                    Console.WriteLine("This will be a deadlock!");
                    Thread.Sleep(1000);
                    lock (lock1)
                    {
                        Console.WriteLine("Acquired a protected resource succesfully");
                    }
                }

                Console.ReadKey();
            }

            static void LockTooMuch(object lock1, object lock2)
            {
                lock (lock1)
                {
                    Thread.Sleep(1000);
                    lock (lock2) ;
                }
            }
        }
        //在线程里执行了LockTooMuch,会先锁定lock1,然后准备锁定lock2,但是在主线程里lock2先被锁定,同时主线程等待lock1释放,而lock1被线程里锁定
        //造成死锁，可用Monitor解决

参考：
https://blog.youkuaiyun.com/qq_35445058/article/details/80704722