How to change the Html file referred inside a div on server side using C#?

I have div inside which contactUsFAQ.html is i开发者_运维问答ncluded.

    <div id="divContactUsFAQ" runat="server" > 
    <!--#include virtual="../HTML/ContactUsFAQ.html" -->
    </div>

I need to include ContactIRP.html file and remove ContactUsFAQ.html on server side.

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you can access the div as divContactUsFAQ from CodeBehind and it has .InnerHTML property containing <!--#include virtual="../HTML/ContactUsFAQ.html" --> - you can just assign what you need to .InnerHTML.