public class LockQueue<T>
    {
        private readonly Queue<T> _queue;
        private readonly object _locker=new object();
        public LockQueue()
        {
            _queue=new Queue<T>();
        }

        public T Dequeue()
        {
            lock (_locker)
            {
                return _queue.Dequeue();
            }
        }

        public void Enqueue(T item)
        {
            lock (_locker)
            {
                _queue.Enqueue(item);
            }
        }
 
    }