How can I do a For in ASP.Net Webforms that adds elements with the

In my .aspx file, I am trying to add List Items within a Dropdown, through a script that contains a For, but I don't know how to correctly add these items. I did a test example to simplify the problem, with numbers from 1 to 10, so you can understand a little better the problem I am having

I tried this

<asp:DropDownList ID="numbers" runat="server">
    <script runat="server">
        void loop() {
            for(int i=1; i<1=10; i++) {
                <asp:ListItem>i</asp:ListItem>
            }
        }
    </script>
</asp:DropDownList>

the error given says "the name asp does not exist in the current context"