public async void CapturePhoto()
{
var videoConnection = stillImageOutput.ConnectionFromMediaType(AVMediaType.Video);
var sampleBuffer = await stillImageOutput.CaptureStillImageTaskAsync(videoConnection);
var jpegImageAsNsData = AVCaptureStillImageOutput.JpegStillToNSData(sampleBuffer);
// SendPhoto (data);
//SendPhoto(jpegImageAsNsData.ToArray());
}