static void Main(string[] args)
        {
            LinkedLists llist1 = new LinkedLists();
            LinkedLists llist2 = new LinkedLists();

            llist1.AddToEnd(new Node(10));
            llist1.AddToEnd(new Node(20));
            llist1.AddToEnd(new Node(30));
            Console.WriteLine("the first List elements are  :");
            llist1.Print();
            llist2.AddToEnd(new Node(15));
            llist2.AddToEnd(new Node(17));
            llist2.AddToEnd(new Node(40));
            Console.WriteLine("the second list elements are  :");
            llist2.Print();

            llist1.head = SortedMerge(llist1.head, llist2.head);

            Console.WriteLine("After sorting two lists The values are :");
            llist1.Print();
            Console.Read();
        }