Download and save images in WP Media Library C#

private void SaveImageClicked(object sender, GestureEventArgs e)
{
    var webClient = new WebClient();
    webClient.OpenReadCompleted += WebClientOpenReadCompleted;
    webClient.OpenReadAsync(new Uri(IMAGE_URL, UriKind.Absolute));
}

void WebClientOpenReadCompleted(object sender, OpenReadCompletedEventArgs e)
{
    const string tempJpeg = "TempJPEG";
    var streamResourceInfo = new StreamResourceInfo(e.Result, null);
 
    var userStoreForApplication = IsolatedStorageFile.GetUserStoreForApplication();
    if (userStoreForApplication.FileExists(tempJpeg))
    {
        userStoreForApplication.DeleteFile(tempJpeg);
    }
 
    var isolatedStorageFileStream = userStoreForApplication.CreateFile(tempJpeg);
 
    var bitmapImage = new BitmapImage { CreateOptions = BitmapCreateOptions.None };
    bitmapImage.SetSource(streamResourceInfo.Stream);
 
    var writeableBitmap = new WriteableBitmap(bitmapImage);
    writeableBitmap.SaveJpeg(isolatedStorageFileStream, writeableBitmap.PixelWidth, writeableBitmap.PixelHeight, 0, 85);
 
    isolatedStorageFileStream.Close();
    isolatedStorageFileStream = userStoreForApplication.OpenFile(tempJpeg, FileMode.Open, FileAccess.Read);
 
    // Save the image to the camera roll or saved pictures album.
    var mediaLibrary = new MediaLibrary();
 
    // Save the image to the saved pictures album.
    mediaLibrary.SavePicture(string.Format("SavedPicture{0}.jpg", DateTime.Now), isolatedStorageFileStream);
 
    isolatedStorageFileStream.Close();
}