
<asp:TreeView runat="server"
    Font-Names="Verdana" 
    ForeColor="Black"
    HoverNodeStyle-Font-Underline="true"
    ShowExpandCollapse="false"
    NodeIndent="0"
>
  <LevelStyles>
    <asp:TreeNodeStyle ChildNodesPadding="10" Font-Bold Font-Size="12pt" ForeColor="DarkGreen"/>
    <asp:TreeNodeStyle ChildNodesPadding="5" Font-Bold Font-Size="10pt" />
    <asp:TreeNodeStyle ChildNodesPadding="5" Font-UnderLine Font-Size="10pt" />
    <asp:TreeNodeStyle Font-Size="8pt" />
  </LevelStyles>
</asp:TreeView>