C# 0 The Complete Reference

PART II

C h a p t e r   2 4 :  

C o l l e c t i o n s ,   E n u m e r a t o r s ,   a n d   I t e r a t o r s    

771

    Queue q = new Queue();

    foreach(int i in q)

      Console.Write(i + " ");

    Console.WriteLine();

    ShowEnq(q, 22);

    ShowEnq(q, 65);

    ShowEnq(q, 91);

    ShowDeq(q);

    ShowDeq(q);

    ShowDeq(q);

    try {

      ShowDeq(q);

    } catch (InvalidOperationException) {

      Console.WriteLine("Queue empty.");

    }

  }

}

The output is shown here:

Enqueue(22)

queue: 22

Enqueue(65)

queue: 22 65

Enqueue(91)

queue: 22 65 91

Dequeue -> 22

queue: 65 91

Dequeue -> 65

queue: 91

Dequeue -> 91

queue:

Dequeue -> Queue empty.

Storing Bits with BitArray

The

BitArray

 class supports a collection of bits. Because it stores bits rather than objects, 

BitArray

 has capabilities different from those of the other collections. However, it still 

supports the basic collection underpinning by implementing 

ICollection

 and 

IEnumerable

.

It also implements