using System.Windows;
using System.Windows.Controls;
using System.Windows.Media;
using System.Windows.Media.Imaging;

namespace WpfApp1
{
     public class MyCanvas : Canvas
     {
          protected BitmapImage _imageFile1;
          protected Point _imagePos1;
          protected Size _imageSize1;
          protected int _imageGoXStep1;

          public void LoadFromResource()
          {
               // load file
               string pathImage = "pack://application:,,,/WpfApp1;component/tree.jpg";
               _imageFile1 = new BitmapImage(new Uri(pathImage, UriKind.Absolute));
               _imagePos1 = new Point(10, 15);
               _imageSize1 = new Size(50, 50);
               _imageGoXStep1 = 1;
          }

          protected override void OnRender(DrawingContext drawingContext)
          {
               drawingContext.DrawImage(_imageFile1, new System.Windows.Rect(_imagePos1, _imageSize1));
          }

          public void MoveObjects()
          {
               _imagePos1.X += _imageGoXStep1;
          }

          public void ReDraw()
          {
               // InvalidateVisual() says Canvas to call OnRender
               InvalidateVisual();
          }
     }

     // MainWindow
     public partial class MainWindow : Window
     {
          protected MyCanvas _myCanvas;
          protected System.Windows.Threading.DispatcherTimer myTimer;
          protected int TimeStepInMilliseconds = 100; // 1/10 second

          public MainWindow()
          {
               InitializeComponent();

               // remove child elements
               Content = null;

               // add Canvas
               _myCanvas = new MyCanvas();
               AddChild(_myCanvas);

               // load image
               _myCanvas.LoadFromResource();

               // timer
               myTimer = new System.Windows.Threading.DispatcherTimer();
               myTimer.Tick += new EventHandler(OnMyTimerTick);
               myTimer.Interval = new TimeSpan(0, 0, 0, 0, TimeStepInMilliseconds); // in milli second
               myTimer.Start();
          }

          private void OnMyTimerTick(object sender, EventArgs e)
          {
               _myCanvas.ReDraw();
               _myCanvas.MoveObjects();
          }
     }
}