DestinationPageUrl depending on user role (OnLoggedIn).

I was wondering how it's possible to redirect the user to a page that depends on the users role.
So if the user is an admin, he gets redirected to /admin/admin.aspx - if the user is an moderator, he gets redirected to /moderator/mod.aspx, etc.


I tried using the OnLoggedIn function this way:
    private void OnLoggedIn(object sender, EventArgs e)
    {
        if(Roles.IsUserInRole("Administrator"))
        {
            Response.Redirect("~/Admins.aspx");
        }
        else
        {
            Response.Redirect("~/Default.aspx");
        }
    }< ...