File: Default.aspx <%@ Page Language="C#" %> <!DOCTYPE html PUBLIC "-//W3C//DTD XHTML 1.1//EN" "http://www.w3.org/TR/xhtml11/DTD/xhtml11.dtd"> <script runat="server"> protected void Page_PreInit(object sender, EventArgs e) { if (Request["theme"] != null) { switch (Request["theme"]) { case "Green": Profile.userTheme = "GreenTheme"; break; case "Pink": Profile.userTheme = "PinkTheme"; break; } } Theme = Profile.userTheme; } </script> <html xmlns="http://www.w3.org/1999/xhtml" > <head runat="server"> <title>Dynamic Theme</title> </head> <body> <form id="form1" runat="server"> <div class="content"> <h1>Dynamic Theme</h1> Please select a Theme: <ul> <li> <a href="Default.aspx?theme=Green">Green Theme</a> </li> <li> <a href="Default.aspx?theme=Pink">Pink Theme</a> </li> </ul> </div> </form> </body> </html> File: Web.config <configuration> <system.web> <profile> <properties> <add name="UserTheme" /> </properties> </profile> </system.web> </configuration>