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Programmatically caching a User Control

<%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <script runat="server">     void Page_Load()     {         PartialCachingControl cacheMe = (PartialCachingControl)Page.LoadControl("Control.ascx");         cacheMe.CachePolicy.SetExpires(DateTime.Now.AddSeconds(15));         PlaceHolder1.Controls.Add(cacheMe);         lblCacheDuration.Text = cacheMe.CachePolicy.Duration.ToString();     } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head id="Head1" runat="server">     <title>Show Dynamic User Control</title> </head> <body>     <form id="form1" runat="server">     <div>     Cache Duration:     <asp:Label         id="lblCacheDuration"         Runat="server" />     <hr />     <asp:PlaceHolder         id="PlaceHolder1"         Runat="server" />     </div>     </form> </body> </html>              File: Control.ascx <%@ Control Language="C#" ClassName="Products" %> <%@ OutputCache Duration="600" VaryByParam="none" %> User Control Time: <%= DateTime.Now.ToString("T") %> <asp:GridView     id="grdProducts"     DataSourceID="srcProducts"     Runat="server" /> <asp:SqlDataSource     id="srcProducts"     ConnectionString="<%$ ConnectionStrings:Products %>"     SelectCommand="SELECT Title,Director FROM Products"     Runat="server" />