SharePoint – SPLongOperation operations

try{

                              using (SPLongOperation longOpearation = new SPLongOperation(this.Page))

                              {

                                             longOpearation.LeadingHTML = "Title of the long operation";//title message

                                             longOpearation.TrailingHTML = "Working on it !”//sub message

                                              longOpearation.Begin();

                                             //Code start

                                             //Write the code that to be processed in long operation

                                             //code ends

                                               HttpContext context = HttpContext.Current;

                                             if (context.Request.QueryString["IsDlg"] != null)

                                             {

                                                            context.Response.Write("<script type='text/javascript'>window.frameElement.commitPopup();</script>");

                                                            context.Response.Flush();

                                                            context.Response.End();

                                              }

                                              else

                                              {

                                                             string url = SPContext.Current.Web.Url;

 longOpearation.End(url, SPRedirectFlags.CheckUrl, context, string.Empty);

                                             }

                              }

               }

               catch (Exception ex)

              {

                              SPUtility.TransferToErrorPage(ex.ToString());//transfores us to the error page with error message

               }