Making a treeview with expandable childnodes

Question

I'm having trouble with a treeview, in ASP.NET.

I'm basically querying a database table. 3 of the colums are important

1. Name
2. Id
3. ParentId

So this amounts to a bunch of Nodes in the TreeView, some which will have Child Nodes, Child Nodes may have more Child Nodes themselves, etc... Top Nodes don't have a ParentId, they are set to null, to indicate that they're top level nodes.

The problem I'm running in to is that there doesn't seem to be a way to add Child Nodes after the Top Nodes have been set.

What I'm looking for it something like this

Top
--First Topnode

--Second Topnode

--Third Topnode
----ChildNode 1
----ChildNode 2
------Sub Childnode 1

--Fourth Topnode

--Fifth Topnode

--Sixth Topnode

"Top" is actually the top node, which then contains the top ideas, sub ideas, etc...

And I can't seem to add childnodes on Top, or any TreeView. The Add() only accepts strings as data. Is there any way I can make it accept a List<> or TreeNodes? Or any other way that I can insert a set of nodes to be childnodes of any existing node?

EDIT: Nevermind, I found it. Apparently, the "Nodes" getter is apparently an Array. Meaning you can do this:

myTreeView.Nodes[0].ChildNodes.Add()

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