public override void OnRequestPermissionsResult(int requestCode, string[] permissions, [GeneratedEnum] Permission[] grantResults)
{
base.OnRequestPermissionsResult(requestCode, permissions, grantResults);
SpeechFactory.ConfigureNativePlatformBindingWithDefaultCertificate();
factory = SpeechFactory.FromSubscription(ApiKeys.SpeechApiKey, ApiKeys.ServiceRegion);
ListenForSpeech();
}