Path Animation with DoubleAnimationUsingPath, AutoReverse

   
  

<Window x:Class="WpfApplication1.PathAnimationExample"
  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Path Animation" Height="500" Width="518">
    <Canvas Margin="5">

        <Polyline Points="0,345,96,345,320,432,500,432" Stroke="Gray"
      StrokeThickness="5" />
        <Path>
            <Path.Data>
                <PathGeometry x:Name="path2" Figures="M0,292 L75,292 300,380,449,380" />
            </Path.Data>
        </Path>
        <Ellipse Name="circle2" Stroke="DarkGoldenrod" Canvas.Left="0"
      Canvas.Top="293" Width="50" Height="50">
            <Ellipse.Fill>
                <LinearGradientBrush>
                    <GradientStop Color="DarkGoldenrod" Offset="0.5" />
                    <GradientStop Color="Gold" Offset="0.5" />
                </LinearGradientBrush>
            </Ellipse.Fill>
            <Ellipse.RenderTransform>
                <RotateTransform x:Name="circle2Rotate" CenterX="25" CenterY="25" />
            </Ellipse.RenderTransform>
        </Ellipse>
    </Canvas>
</Window>

//File:Window.xaml.cs

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

namespace WpfApplication1
{
    public partial class PathAnimationExample : Window
    {
        public PathAnimationExample()
        {
            InitializeComponent();

            path2.Freeze(); // For performance benefits. 
            DoubleAnimationUsingPath daPath = new DoubleAnimationUsingPath();
            daPath.Duration = TimeSpan.FromSeconds(5);
            daPath.RepeatBehavior = RepeatBehavior.Forever;
            daPath.AccelerationRatio = 0.6;
            daPath.DecelerationRatio = 0.4;
            daPath.AutoReverse = true;
            daPath.PathGeometry = path2;
            daPath.Source = PathAnimationSource.X;
            circle2.BeginAnimation(Canvas.LeftProperty, daPath);

            daPath = new DoubleAnimationUsingPath();
            daPath.Duration = TimeSpan.FromSeconds(5);
            daPath.RepeatBehavior = RepeatBehavior.Forever;
            daPath.AccelerationRatio = 0.6;
            daPath.DecelerationRatio = 0.4;
            daPath.AutoReverse = true;
            daPath.PathGeometry = path2;
            daPath.Source = PathAnimationSource.Y;
            circle2.BeginAnimation(Canvas.TopProperty, daPath);

        }
    }
}