Catrobat.IDE.WindowsPhone.Controls.LargeImageButton.ImageChanged C# (CSharp) Метод

        private static void ImageChanged(DependencyObject d, 
            DependencyPropertyChangedEventArgs e)
        {
            var instance = (d as LargeImageButton);
            if (instance == null) return;

            instance.LeftImage.Source = ((ImageSource) e.NewValue);

            instance.LeftImage.Visibility = Visibility.Visible;
            instance.ContentControlImageLeft.Visibility = Visibility.Collapsed;

        }