private void InitializeVideoBrush() { var cr = _videoBrush.RelativeTransform as CompositeTransform; if (cr != null) { cr.Rotation = _photoCamera.Orientation; } try { _luminanceSource = new PhotoCameraLuminanceSource( Convert.ToInt32(_photoCamera.PreviewResolution.Width), Convert.ToInt32(_photoCamera.PreviewResolution.Height)); _initialized = true; StartScanning(); } catch (Exception ex) { OnError(ex); } }