Remove Animations with AnimationClock

   
  

<Window x:Class="WpfApplication1.Window1"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="" Height="300" Width="300">
  <Window.Resources>
    <Storyboard x:Key="Storyboard1">
      <ParallelTimeline>
        <DoubleAnimation x:Name="Animation1" Storyboard.TargetProperty="Width" From="140" To="50"
          AutoReverse="True" RepeatBehavior="Forever" />
        <DoubleAnimation Storyboard.TargetProperty="Opacity" To="0.5" AutoReverse="True" RepeatBehavior="Forever" />
      </ParallelTimeline>
    </Storyboard>
  </Window.Resources>

  <UniformGrid>
    <Button x:Name="button3" Content="Method 3" Click="Button3_Click" Loaded="Button3_Loaded" />
  </UniformGrid>
</Window>
//File:Window.xaml.cs

using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Media.Animation;

namespace WpfApplication1
{
    public partial class Window1 : Window
    {
        private AnimationClock opacityClock;
        private AnimationClock widthClock;
        public Window1()
        {
            InitializeComponent();
        }

        private void Button3_Loaded(object sender, RoutedEventArgs e)
        {
            DoubleAnimation opacityAnimation = new DoubleAnimation(1d, 0.5d, TimeSpan.FromSeconds(1), FillBehavior.HoldEnd);
            opacityAnimation.RepeatBehavior = RepeatBehavior.Forever;
            opacityAnimation.AutoReverse = true;
            opacityClock = opacityAnimation.CreateClock();
            button3.ApplyAnimationClock(Button.OpacityProperty, opacityClock);

            DoubleAnimation widthAnimation = new DoubleAnimation(140d, 50d, TimeSpan.FromSeconds(1), FillBehavior.HoldEnd);
            widthAnimation.RepeatBehavior = RepeatBehavior.Forever;
            widthAnimation.AutoReverse = true;
            widthClock = widthAnimation.CreateClock();
            button3.ApplyAnimationClock(Button.WidthProperty, widthClock);
        }
        private void Button3_Click(object sender, RoutedEventArgs e)
        {
            opacityClock.Controller.Remove();
            widthClock.Controller.Remove();
        }        
    }
}