void PositionImage()
{
//ImageExtendedSplash.SetValue(Viewbox.HeightProperty, _splashImageRect.Height);
//ImageExtendedSplash.SetValue(Viewbox.WidthProperty, _splashImageRect.Width);
ImageExtendedSplash.Height = _splashImageRect.Height;
ImageExtendedSplash.Width = _splashImageRect.Width;
}