public void SizeofAnQueue()
        {
            Queue queue           = new Queue();
            int   myFirstElement  = 56;
            int   mySecondElement = 30;
            int   myThirdElement  = 70;

            queue.Enqueue(myFirstElement);
            queue.Enqueue(mySecondElement);
            queue.Enqueue(myThirdElement);
            int size = queue.Size();

            Assert.AreEqual(3, size);
        }