private async void RequestAuthorization() { ////GET FROB //flickr.AuthGetFrobAsync(new Action<FlickrNet.FlickrResult<string>>(x=>{ // if (x.Result != null) // { // frob = x.Result; // //USE FROB TO GET URL FOR USER AUTHENTICATION // string url = flickr.AuthCalcUrl(frob, FlickrNet.AuthLevel.Write); // Windows.System.Launcher.LaunchDefaultProgram(new Uri(url)); // Dispatcher.Invoke(Windows.UI.Core.CoreDispatcherPriority.High, new Windows.UI.Core.InvokedHandler((r,a) => { // butRequestAuthorization.IsEnabled = false; // butAuthorizationGiven.IsEnabled = true; // }), this, null); // } //})); //1. GET THE OAUTH REQUEST TOKEN //2. CONSTRUCT A URL & LAUNCH IT TO GET AN "AUTHORIZATION" TOKEN await _flickr.OAuthGetRequestTokenAsync("oob", async (x) => //{} new Action<FlickrResult<OAuthRequestToken>>(x => { if (!x.HasError) { rt = x.Result; string url = _flickr.OAuthCalculateAuthorizationUrl(rt.Token, FlickrNet.AuthLevel.Write); try { await Windows.System.Launcher.LaunchUriAsync(new Uri(url), new Windows.System.LauncherOptions() { DisplayApplicationPicker = true }); Dispatcher.RunAsync( Windows.UI.Core.CoreDispatcherPriority.High, new Windows.UI.Core.DispatchedHandler(() => { butLoginRequest.Visibility = Visibility.Collapsed; butLoginConfirm.Visibility = Visibility.Visible; //butRequestAuthorization.IsEnabled = false; //butAuthorizationGiven.IsEnabled = true; //txtOAuthVerificationCode.IsEnabled = true; }) ); } catch (Exception ex) { var m = ex.Message; } } ; }); }