QR code scanner code

MainPage.cs

        private void ScanPreviewBuffer()
        {
            try
            {
                _photoCamera.GetPreviewBufferY(_luminance.PreviewBufferY);
                var binarizer = new HybridBinarizer(_luminance);
                var binBitmap = new BinaryBitmap(binarizer);
                var result = _reader.decode(binBitmap);
                Dispatcher.BeginInvoke(() => DisplayResult(result.Text));
            }
            catch
            {
            }            
        }

        private void DisplayResult(string text)
        {
            if(!_matches.Contains(text))
                _matches.Add(text);            
        }