Stop, resume animation with Storyboard
<Window xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation" xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml" x:Class="WpfApplication1.Window1" Title="Color Spinner" Height="370" Width="270" > <Window.Resources> <Storyboard x:Key="Spin"> <DoubleAnimationUsingKeyFrames BeginTime="00:00:00" Storyboard.TargetName="ellipse1" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[0].(RotateTransform.Angle)" RepeatBehavior="Forever"> <SplineDoubleKeyFrame KeyTime="00:00:10" Value="360"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </Window.Resources> <Window.Triggers> <EventTrigger RoutedEvent="FrameworkElement.Loaded"> <BeginStoryboard Storyboard="{StaticResource Spin}" x:Name="Spin_BeginStoryboard"/> </EventTrigger> <EventTrigger RoutedEvent="ButtonBase.Click" SourceName="goButton"> <ResumeStoryboard BeginStoryboardName="Spin_BeginStoryboard"/> </EventTrigger> <EventTrigger RoutedEvent="ButtonBase.Click" SourceName="stopButton"> <PauseStoryboard BeginStoryboardName="Spin_BeginStoryboard"/> </EventTrigger> </Window.Triggers> <Window.Background> <LinearGradientBrush EndPoint="0.5,1" StartPoint="0.5,0"> <GradientStop Color="#FFFFFFFF" Offset="0"/> <GradientStop Color="#FFFFC45A" Offset="1"/> </LinearGradientBrush> </Window.Background> <Grid> <StackPanel> <Ellipse Margin="15,85,0,0" Name="ellipse1" Stroke="{x:Null}" Height="80" HorizontalAlignment="Left" VerticalAlignment="Top" Width="120" Fill="Red" Opacity="0.5" RenderTransformOrigin="0.92,0.5" > <Ellipse.BitmapEffect> <BevelBitmapEffect/> </Ellipse.BitmapEffect> <Ellipse.RenderTransform> <TransformGroup> <RotateTransform Angle="0"/> </TransformGroup> </Ellipse.RenderTransform> </Ellipse> <Button Name="goButton" Content="Go"/> <Button Name="stopButton" Content="Stop"/> <Button Name="toggleButton" Content="Toggle" Click="toggleButton_Click" /> </StackPanel> </Grid> </Window> //File:Window.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Text; using System.Windows; using System.Windows.Controls; using System.Windows.Data; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Imaging; using System.Windows.Navigation; using System.Windows.Shapes; using System.Windows.Media.Animation; namespace WpfApplication1 { public partial class Window1 : Window { public Window1() { InitializeComponent(); } private void toggleButton_Click(object sender, RoutedEventArgs e) { Storyboard spinStoryboard = Resources["Spin"] as Storyboard; if (spinStoryboard != null) { if (spinStoryboard.GetIsPaused(this)) { spinStoryboard.Resume(this); } else { spinStoryboard.Pause(this); } } } } }