1.the response.request,server,session in a selfcreate class

   class A

 { 
    protected HttpSessionState Session; 
    protected HttpServerUtility Server;
    protected HttpRequest Request;
    procteted HtpResponse Response;

  public A(object parent)
    {
    Try
        {
       Session=((System.Web.Ui.Page)parent).Session;
        Server=((System.Web.Ui.Page)parent).Server;
        Request=((System.Web.Ui.Page)parent).Request;
        Response=((System.Web.Ui.Page)parent).Response;
       }
    Catch
    {
        Session=((System.Web.Ui.UserControl)parent).Session;
        Server=((System.Web.Ui.UserControl)parent).Server;
        Request=((System.Web.Ui.UserControl)parent).Request;
        Response=((System.Web.Ui.UserControl)parent).Response;
    }

  }