Use SplineKeyframe
<UserControl x:Class='SilverlightApplication3.MainPage' xmlns='http://schemas.microsoft.com/winfx/2006/xaml/presentation' xmlns:x='http://schemas.microsoft.com/winfx/2006/xaml' xmlns:d='http://schemas.microsoft.com/expression/blend/2008' xmlns:mc='http://schemas.openxmlformats.org/markup-compatibility/2006' mc:Ignorable='d' d:DesignWidth='640' d:DesignHeight='480'> <UserControl.Resources> <Storyboard x:Name="Storyboard1"> <DoubleAnimationUsingKeyFrames Storyboard.TargetName="Rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.X)" BeginTime="00:00:00"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="200"/> <SplineDoubleKeyFrame KeyTime="00:00:01" Value="526"/> <SplineDoubleKeyFrame KeyTime="00:00:01.5" Value="253"/> <SplineDoubleKeyFrame KeyTime="00:00:02" Value="13"/> </DoubleAnimationUsingKeyFrames> <DoubleAnimationUsingKeyFrames Storyboard.TargetName="Rectangle" Storyboard.TargetProperty="(UIElement.RenderTransform).(TransformGroup.Children)[3].(TranslateTransform.Y)" BeginTime="00:00:00"> <SplineDoubleKeyFrame KeyTime="00:00:00.5" Value="-121"/> <SplineDoubleKeyFrame KeyTime="00:00:01" Value="55"/> <SplineDoubleKeyFrame KeyTime="00:00:01.5" Value="305"/> <SplineDoubleKeyFrame KeyTime="00:00:02" Value="84"/> </DoubleAnimationUsingKeyFrames> </Storyboard> </UserControl.Resources> <Canvas x:Name="LayoutRoot" Background="White" > <Rectangle Height="100" Width="163" Fill="Red" RadiusY="13" RadiusX="13" Canvas.Top="154" Canvas.Left="46" RenderTransformOrigin="0.5,0.5" x:Name="Rectangle"> <Rectangle.RenderTransform> <TransformGroup> <ScaleTransform/> <SkewTransform/> <RotateTransform/> <TranslateTransform/> </TransformGroup> </Rectangle.RenderTransform> </Rectangle> </Canvas> </UserControl> //File: Page.xaml.cs using System; using System.Collections.Generic; using System.Linq; using System.Net; using System.Windows; using System.Windows.Controls; using System.Windows.Documents; using System.Windows.Input; using System.Windows.Media; using System.Windows.Media.Animation; using System.Windows.Shapes; namespace SilverlightApplication3 { public partial class MainPage : UserControl { public MainPage() { InitializeComponent(); Storyboard1.Begin(); } } }