async private void GetPreview()
{
Windows.Media.Capture.MediaCapture takePhotoManager = new Windows.Media.Capture.MediaCapture();
await takePhotoManager.InitializeAsync();
// start previewing
PhotoPreview.Source = takePhotoManager;
await takePhotoManager.StartPreviewAsync();
// to stop it
await takePhotoManager.StopPreviewAsync();
ImageEncodingProperties imgFormat = ImageEncodingProperties.CreateJpeg();
// a file to save a photo
StorageFile file = await ApplicationData.Current.LocalFolder.CreateFileAsync(
"Photo.jpg", CreationCollisionOption.ReplaceExisting);
await takePhotoManager.CapturePhotoToStorageFileAsync(imgFormat, file);
// Get photo as a BitmapImage
BitmapImage bmpImage = new BitmapImage(new Uri(file.Path));
// imagePreivew is a <Image> object defined in XAML
imagePreivew.Source = bmpImage;
}