<!DOCTYPE html>
<html>
<body>
<form runat="server">

<asp:Bulletedlist id="bl1" runat="server" BulletStyle="Numbered" FirstBulletNumber="4">
   <asp:ListItem Value="Item 1" />
   <asp:ListItem Value="Item 2" />
   <asp:ListItem Value="Item 3" />
   <asp:ListItem Value="Item 4" />
</asp:Bulletedlist>

</form>
</body>
</html>