How to implement Tree in C#

Check this article: http://www.codeproject.com/KB/recipes/treecollection.aspx

How about something like this?

 public class node
    {
         public node ParentNode;
         public int value;

        public node(int Nodevalue)
        {
            this.value = Nodevalue;
        }

        public node(int Nodevalue, node CurrentParent)
        {
            this.value = Nodevalue;
            this.ParentNode = CurrentParent;
        }

        public node lookupParent(node LookupNode)
        {

            return LookupNode.ParentNode;

        }
    }
]

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I mean I am just starting out from scratch and I am not sure what  would be the optimum way to store the informaiton. should I also include the children's information?

IF I do then it would becode redundant  information and there would be a lot of scope for conflict.
On the other hand if I do not include the children's information then I do not see a good way to traverse the whole tryy given the root node.

Please advise?

Ok Yes, you are right. Thanks.