tree view in .net


I have created a tree view (see code section)

In which there is a root element called "$".

Now I want add nodes in this root column programatically. How can I do that in

<asp:TreeView ID = "tvMain" ExpandDepth = "0" PopulateNodesFromClient = "true" ShowLines = "true" 
                            ShowExpandCollapse = "true" runat = "server" CollapseImageUrl = "~/images/Folder.JPG" 
                            ExpandImageUrl = "~/images/FolderExpanded.JPG">
                                 <asp:TreeNode Text="$" ImageUrl = "~/images/Folder.JPG">
                                     <asp:TreeNode Text="$" ImageUrl = "~/images/Folder.JPG">                                 

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ddayx10Connect With a Mentor Commented:
   Protected Sub Page_Load(ByVal sender As Object, ByVal e As System.EventArgs) Handles Me.Load
        'just doing this so we dont add nodes every time posted back, completely optional
        'pick your poison from below
        If Not IsPostBack Then
            'Adds another child to the parent
            tvMain.Nodes(0).ChildNodes.Add(New TreeNode("$", "255", "~/images/Folder.JPG"))

            'Adds another node to the parent level
            tvMain.Nodes.Add(New TreeNode("$", "255", "~/images/Folder.JPG"))
        End If
    End Sub
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