friends following code is note working:---
please correct it or give me an optimal code
<%@ Application Language="C#" %>
<%@ Import Namespace="decentSoftwareServices" %>
<%@ Import Namespace="System.Web.Optimization" %>
<%@ Import Namespace="System.Web.Routing" %>
<script runat="server">
    void Application_Start(object sender, EventArgs e)
    {
        RegisterRoutes(RouteTable.Routes);
        // Code that runs on application startup
        BundleConfig.RegisterBundles(BundleTable.Bundles);
        AuthConfig.RegisterOpenAuth();
    }    
    void Application_End(object sender, EventArgs e)
    {
        //  Code that runs on application shutdown
    }
    void Application_Error(object sender, EventArgs e)
    {
        // Code that runs when an unhandled error occurs
    }
    public static void RegisterRoutes(RouteCollection routes)
    {
        routes.MapPageRoute("index", "index", "~/guest/index.aspx");
        routes.MapPageRoute("contact", "contact", "~/guest/contactUs.aspx");
    }
</script>