/// <summary>
 /// 返回并移除队首元素
 /// </summary>
 /// <param name="action"></param>
 /// <returns></returns>
 public bool TryDequeueActionSeqQueue(out ContextAsyncAction action)
 {
     return(_queue.TryDequeue(out action));
 }
 /// <summary>
 /// 元素入队
 /// </summary>
 /// <param name="action"></param>
 public void EnqueueActionSeqQueue(ContextAsyncAction action)
 {
     _queue.Enqueue(action);
 }