c# - How to get result from Google OAuth API if user close browser window? -

i create wpf application uses google api client library .net. following sample, wrote code below:

        var credential = googlewebauthorizationbroker.authorizeasync(             secrets,             new[] { "https://www.googleapis.com/auth/contacts.readonly" },             "user",             cancellationtoken.none,             new filedatastore(tokenstoragename)).result; 

calling of authorizeasync method opens new browser window/tab login form. problem appears if user close browser window or tab. never result of call.

can how handle situation ?

should change source code of authorizeasync(...) ?

the way i've managed work around bug add timeout period dalmto suggested. it's not ideal haven't found way round issue.

to used following code:

            '/ create new threading task /'             dim objtask task(of google.apis.auth.oauth2.usercredential)              '/ call google auth process /'             objtask = googlewebauthorizationbroker.authorizeasync(objsecrets, mobjscopes, "user", cancellationtoken.none, objfilestore)              '/ wait 2 minutes response /'             objtask.wait(240000)              '/ if time out period expired status still waiting activation /'             if objtask.status <> tasks.taskstatus.waitingforactivation                 '/ return user credentials /'                 return objtask.result             end if