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Code Animation Accelerate Decelerate

<Window x:Class="SimpleCodeAnimation.AccelerateDecelerate"     xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"     xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"     Title="Acceleration and Deceleration" Height="300" Width="300">     <Grid>       <Ellipse Name="myEllipse" Fill="Red" Height="100" Width="10" />     </Grid> </Window> //File:Window.xaml.cs using System; using System.Collections.Generic; 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.Shapes; using System.Windows.Media.Animation; namespace SimpleCodeAnimation {     public partial class AccelerateDecelerate : System.Windows.Window     {         public AccelerateDecelerate()         {             InitializeComponent();         }         protected override void OnMouseDown(MouseButtonEventArgs e)         {             DoubleAnimation animate = new DoubleAnimation();             animate.By = 100;             animate.Duration = new Duration(TimeSpan.FromSeconds(3));             animate.AccelerationRatio = 0.2;             animate.DecelerationRatio = 0.1;             myEllipse.BeginAnimation(Ellipse.WidthProperty, animate);         }     } }