browser - C# Webclient not working properly -

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i've created simple tool can find sign option in websites (200 website list in arraylist). using webbrowser has problem of cache , cookie switched webclient. works fine when put breakpoints , debug when run normally, include websites doesn't have signup option. here code

private void btnsearch_click(object sender, eventargs e)     {                        timer1.enabled = true;             timer1.start();     }

timer1 code

 string st;         private void timer1_tick(object sender, eventargs e)         {                 st = ""; application.doevents();                                         try                         {                             st = lst[dataindex2].tostring();                                    using (webclient asyncwebrequest = new webclient())                             {                                 asyncwebrequest.downloaddatacompleted += asyncwebrequest_downloaddatacompleted;                                 uri urltorequest = new uri(st);                                 asyncwebrequest.downloaddataasync(urltorequest);                                 asyncwebrequest.dispose();                             }                              dataindex2++;                             if (dataindex2 == lst.count)                             {                                 timer1.stop();                                                                 lblstatus.text = "stopped";                                 lblstatus.forecolor = color.darkred;                                 messagebox.show("search completed");                                                             }                         }                         catch (exception ex)                         {                             timer1.stop();                                                         lblstatus.text = "stopped";                             lblstatus.forecolor = color.darkred;                             timer1.dispose();                             messagebox.show(ex.message);                             return;                         }

asyncwebrequest_downloaddatacompleted code:

private void asyncwebrequest_downloaddatacompleted(object sender, downloaddatacompletedeventargs e)     {         if (e.error != null)         {             timer1.stop();             ena();             lblstatus.text = "stopped";             lblstatus.forecolor = color.darkred;             timer1.dispose();                             messagebox.show(e.error.message);                         }          if (e.result != null && e.result.length > 0)         {             string browsetext = "";             int = isuccess = 0;             browsetext = encoding.default.getstring(e.result);                      isuccess = browsetext.indexof("sign up") + 1;                     if (isuccess == 0)                     {                      }                     else                     {                          listbox1.items.add(st);                         domaincount++;                                                     lbldomaincount.forecolor = color.darkgreen;                         lbldomaincount.text = domaincount.tostring();                     }                 }                 else                 {                 }             }         }         else         {             messagebox.show("no data found.");         }     }

please , if there alternate of webclient doesn't hang gui please suggest. ty.

you dispose webclient start download. 

asyncwebrequest.downloaddataasync(urltorequest); asyncwebrequest.dispose();

please , if there alternate of webclient doesn't hang gui

see my other answer creates wrapper webclient able use async/await. httpclient can alternative too.


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