gistfile1.cs

//TData is a type parameter name, sort of like a type variable
public class Node<TData> {
   public Node(TData data){
      Value = data;
      ConnectedNodes = new List<Node>();
   }

   //notice that TData is the type parameter name from above
   public TData Value { get; private set; }
   public IList<Node<TData>> ConnectedNodes { get; private set; }
}