static void Main(string[] args)
        {
            LinkList theList = new LinkList();

            theList.insertFirst(22, 2.99);
            theList.insertFirst(44, 4.99);
            theList.insertFirst(66, 6.99);
            theList.insertFirst(88, 8.99);

            theList.displayList();

            Link f = theList.find(44);

            if (f != null)
            {
                Console.WriteLine("Found link with key " + f.iData);
            }
            else
            {
                Console.WriteLine("Can't find link");
            }


            Link d = theList.delete(66); //delete item

            if (d != null)
            {
                Console.WriteLine("Deleted link with key " + d.iData);
            }
            else
            {
                Console.WriteLine("Can't delete item");
            }


            theList.displayList();
            Console.ReadKey();
        }