Indexes with specific values not working!?

Question

Hi

I have a Node class as follows:-

namespace LinkedListDS

{

    public class Node

    {

        public object data;

        public Node next;

        public Node(object data, Node next)

        {

            this.data = data;

            this.next = next;

        }

        public object Data

        {

            get { return this.data; }

            set { this.data = value; }

        }

        public Node Next

        {

            get { return this.next; }

            set { this.next = value; }

        }

    }

}

My LinkedList class is as follows:-

namespace LinkedListDS

{

    public class LinkedList

    {

        private Node head;

        private int count;

        public LinkedList()

        {

            this.head = null;

            this.count = 0;

        }

        public bool Empty

        {

            get { return this.count == 0; }

        }

        public int Count

        {

            get { return this.count; }

        }

        public object Add(int index, object o)

        {

            if (index < 0)

                throw new ArgumentOutOfRangeException();

            if (index > count)

                index = count;

            Node current = this.head;

            if (this.Empty || index == 0)

            {

                this.head = new Node(o, this.head);

            }

            else

            {

                for (int i = 0; i < index - 1; i++)

                     

                    current = current.Next;

                current.Next = new Node(o, current.Next);

             

            }

            count++;

            return o;

        }

    }

}

When using the Add method as follows:-

class Program

    {

        static void Main(string[] args)

        {

            LinkedList a = new LinkedList();

            a.Add(2, "first");

            a.Add(77, "second");

            a.Add(66, "third");

            a.Add(32, "fourth");

            Console.WriteLine();

            Console.ReadLine();

        }

    }

The ints im passing in for the index are showing as

2 = 0

77 = 1

66 = 2

32 = 3

So its using the zero based index rather than the values Im passing in?

Also im not sure how the Next property is working to show the next item?

Regards