private void LaunchAuthentication() { var url = _vidMeClient.GetAuthUrl(Constants.ClientId, Constants.CallBackUrl, new List <Scope> { Scope.Videos, Scope.VideoUpload, Scope.Channels, Scope.Comments, Scope.Votes, Scope.Account, Scope.AuthManagement, Scope.ClientManagement }); WebAuthenticationBroker.AuthenticateAndContinue(new Uri(url), new Uri(Constants.CallBackUrl), new ValueSet(), WebAuthenticationOptions.None); }