why to use queue.Peek() instead of queue.First()/Last()

Question

Queue contains special method queue.Peek(), why should I use it when I can use general queue.First() and queue.Last() ?

Answer 1

Peek is a classic method of a queue, where as First and Last are Linq methods. Since the queue most likely implements IEnumerable you get the methods First and Last which have no relevance to an strict queue.

---

EDIT

It's not the end of the world to bend the law of a queue. Sounds like you are using the structure to fit your needs. It might be confusing to the next programmer though who expects a queue to act like a queue. Maybe you create a class that extends Queue, called a StackedQueue. Then if someone needs to maintain your code they won't expect a queue's behavior