c＃ - Google Calendar API GoogleWebAuthorizationBroker挂起

Question

我正在尝试从ASP.NET MVC C＃Web应用程序运行Google Calendar API。当我在这种模式下进行调试时，代码会挂起credential = GoogleWebAuthorizationBroker.AuthorizeAsync，我假设它正在尝试工作并超时，但我没有从浏览器或Visual Studio收到任何反馈

public void AddEventToCalendar(ConcertModel concert)
{
    var scope = new[] {CalendarService.Scope.Calendar};

    UserCredential credential;

    var fileName = @"G:\\Source\\Hudl\\Hudl\\Hudl\\Content\\client_secrets.json";
    using (var stream = new FileStream(fileName, FileMode.Open, FileAccess.Read))
    {

        credential = GoogleWebAuthorizationBroker.AuthorizeAsync(
            GoogleClientSecrets.Load(stream).Secrets,
            scope, "user", CancellationToken.None,
            new FileDataStore("Calendar.Vb.Sample")).Result;
    }

    var initializer = new BaseClientService.Initializer();
    initializer.HttpClientInitializer = credential;
    initializer.ApplicationName = "VB.NET Calendar Sample";
    _service = new CalendarService(initializer);

    IList<CalendarListEntry> list = _service.CalendarList.List().Execute().Items;

    DisplayList(list);
    foreach (var calendar in list)
    {
        DisplayFirstCalendarEvents(calendar);
    }
}

我使用的是测试版Microsoft.Bcl.Async v1.0.166在.NET 4.0中运行