public Storyboard HideStoryBoard()

{

Storyboard storyboard = new Storyboard();

double num = 0.2;

DoubleAnimation animation = new DoubleAnimation();

Storyboard.SetTarget(animation, sp);

animation.SetValue(Storyboard.TargetPropertyProperty, new PropertyPath("(UIElement.RenderTransform).(CompositeTransform.TranslateX)"));

animation.To = ;

animation.From = ((CompositeTransform)sp.RenderTransform).TranslateX;

animation.Duration = new Duration(TimeSpan.FromSeconds(num));

PowerEase ease = new PowerEase();

ease.EasingMode = EasingMode.EaseInOut;

ease.Power = 2.0;

animation.EasingFunction = ease;

DoubleAnimation animationOpacity = new DoubleAnimation();

Storyboard.SetTarget(animationOpacity, sp);

animationOpacity.SetValue(Storyboard.TargetPropertyProperty, new PropertyPath("UIElement.Opacity"));

animationOpacity.To = ;

animationOpacity.From = ;

animationOpacity.Duration = new Duration(TimeSpan.FromSeconds(num));

animationOpacity.SetValue(Storyboard.TargetNameProperty, "sp");

animationOpacity.SetValue(Storyboard.TargetPropertyProperty, new PropertyPath("UIElement.Opacity"));

Storyboard.SetTargetName(animationOpacity, sp.Name);

Storyboard.SetTargetProperty(animationOpacity, new PropertyPath(StackPanel.OpacityProperty));

storyboard.Children.Add(animation);

storyboard.Children.Add(animationOpacity);

return storyboard;

}

            <Button x:Name="myStackPanel">

                <Button.Triggers>

                    <EventTrigger>

                        <BeginStoryboard>

                            <Storyboard>

                                <ColorAnimation BeginTime="00:00:00" From="Red" To="Transparent" Duration="0:0:3"

                                                Storyboard.TargetName="mySolidColorBrush"

                                        Storyboard.TargetProperty="Color">

                                </ColorAnimation>

                            </Storyboard>

                        </BeginStoryboard>

                    </EventTrigger>

                </Button.Triggers>

                <Button.Background>

                    <SolidColorBrush x:Name="mySolidColorBrush" Color="Red" />

                </Button.Background>

            </Button>