How to use TDoublyLinkedList

[jkour]

Hi,
Can you provide an example about how to use TDoublyLinkedList?

This is what I have so far:

  var list: TDoublyLinkedList:=TDoublyLinkedList.Create;
  list.Append(TDoublyLinkedString.Create('1'));
  var ni:TDoublyLinkedString:=TDoublyLinkedString.Create('2');
  ni.Append('2.1');
  ni.Append('2.2');
  list.Append(ni);
  list.free;

How do I iterate through the elements?
I'd like to produce the following output:
1
2 - 2.1 - 2.2