public void Dequeue()
{
Guest p = _queue.Dequeue();
if (p == LastInQueue)
{
LastInQueue = null;
}
FrontInQueue = _queue.Peek();
LastInQueue = _queue.LastOrDefault();
}
public void Enqueue(Guest person)
{
_queue.Enqueue(person);
LastInQueue = person;
if (FrontInQueue == null)
{
FrontInQueue = person;
}
}