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Use post-cache substitution programmatically by using the Response WriteSubstitution() method

<%@ Page Language="C#" %> <%@ OutputCache Duration="15" VaryByParam="none" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.0 Transitional//EN" "http://www.w3.org/TR/xhtml1/DTD/xhtml1-transitional.dtd"> <script runat="server">     public static string GetTime(HttpContext context)     {         return DateTime.Now.ToString("T");     } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">     <title>Show WriteSubstitution</title> </head> <body>     <form id="form1" runat="server">     <div>     The cached time is: <%= DateTime.Now.ToString("T") %>     <hr />     The substitution time is:     <% Response.WriteSubstitution(GetTime); %>     </div>     </form> </body> </html>