internal void AnimateTextBox(TextBox textBox, Color color) {
// Attaching the NameScope to the label makes sense if you're only animating
// things that belong to that label; this allows you to animate any number
// of labels simultaneously with this method without SetTargetName setting
// the wrong thing as the target.
NameScope.SetNameScope(textBox, new NameScope());
textBox.Background = new SolidColorBrush(color);
textBox.RegisterName("Brush", textBox.Background);
ColorAnimation highlightAnimation = new ColorAnimation();
highlightAnimation.To = Colors.Transparent;
highlightAnimation.Duration = TimeSpan.FromSeconds(3);
Storyboard.SetTargetName(highlightAnimation, "Brush");
Storyboard.SetTargetProperty(highlightAnimation, new PropertyPath(SolidColorBrush.ColorProperty));
Storyboard sb = new Storyboard();
sb.Children.Add(highlightAnimation);
sb.Begin(textBox);
}