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Home/ Questions/Q 6640721
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Editorial Team
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Editorial Team
Asked: May 25, 20262026-05-25T23:42:21+00:00 2026-05-25T23:42:21+00:00

I use asp.net and C# 4. I would like to know if is possible

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I use asp.net and C# 4.

I would like to know if is possible and how to retrieve a “Normal” (not asp.net) element in Code Behind.

For instance: I have a <li></li>, I would like get it from my logic and set is Visible to False.

At the moment I tried to change the MarkUp with:

    <li ID="li-item" runat="server">
    // Does not work I get Error: ID no identified....

I’m pretty new to Asp.Net, please give me a sample of code. Thanks for your support.
PS: I hope to do not get down votes because it is a too trivial question 🙂

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  1. Editorial Team
    Editorial Team
    2026-05-25T23:42:22+00:00Added an answer on May 25, 2026 at 11:42 pm

    "li-item" is not a valid identifier. And you need to close the li tag.

    Try:

    <li ID="li_item" runat="server"></li>
    

    (I have used an underscore instead of -)

    Now it should work

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