c# - DownloadFileAsync shows as completed but no file exists in specified directory -

i using:

webclient client = new webclient(); client.downloadprogresschanged += new downloadprogresschangedeventhandler(client_downloadprogresschanged); client.downloadfilecompleted += new system.componentmodel.asynccompletedeventhandler(client_downloadfilecompleted); client.downloadfileasync(new uri(selected.url), fh.tempfolder); 

to download file url know works. fh.tempfolder c:\users\<username>\appdata\local\temp\filestoretemp , have updated manifest elevate application highest available user level, yet file not download location.

the downloadfilecompleted event fires, when debug , step through, appears though download goes start completed, shouldnt happen file few hundred mb in size, , time needed download it.

i have tried changing download location desktop , still same thing.

you must specify folder , file name destination in method downloadfileasync. msdn link

webclient client = new webclient(); string tempfolder = @"c:\temp\"; client.downloadfileasync("test.com\test.txt",tempfolder); // won't work client.downloadfileasync("test.com\test.txt",tempfolder + "test.txt"); // works