I commented out HTML code, but the control inside it is not disabled

I commented out my table开发者_Python百科 in HTML code. Although the table does get removed, the control inside it seems to persist.

<div>
    <asp:Label ID="Label1" runat="server" Font-Bold="True" Font-Size="X-Large" ForeColor="#0066CC"></asp:Label>
    <!--
    <table>
        <tr>
            <td>
                <asp:Label ID="Label1" runat="server" Font-Bold="True" Font-Size="X-Large" ForeColor="#0066CC"></asp:Label>
            </td>
        </tr>
    </table>
    -->
</div>

When I run my application, visual studio give me an error:

The ID 'Label1' is already used by another rcontrol.

I do not know why visual studio still checks the control inside the commented out portion of my HTML. Does anybody have any clue on this matter? Thanks in advance!

---

That is html comment, not the asp.net server side comment. You should use <% -- code --%>

<%--
    Commented out HTML/CODE/Markup.  Anything with
    this block will not be parsed/handled by ASP.NET.

    <asp:Calendar runat="server"></asp:Calendar> 

    <%# Eval(“SomeProperty”) %>     
--%>

Take a look at Scott Guthrie's post