WPF C#

    xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
    xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml">
  
          Fill="red" Width="50" Height="50" />
  

//File:Window.xaml.cs
using System;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Media;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Windows.Media.Animation;
namespace Microsoft.Samples.PerFrameAnimations
{
    public partial class FrameIndependentFollowExample : Page
    {
        private Vector _rectangleVelocity = new Vector(0, 0);
        private Point _lastMousePosition = new Point(500, 500);
        private TimeSpan _lastRender;
        public FrameIndependentFollowExample(): base()
        {
            _lastRender = TimeSpan.FromTicks(DateTime.Now.Ticks);
            CompositionTarget.Rendering += UpdateRectangle;
        }
        private void UpdateRectangle(object sender, EventArgs e)
        {
            RenderingEventArgs renderArgs = (RenderingEventArgs)e;
            Double deltaTime = (renderArgs.RenderingTime - _lastRender).TotalSeconds;
            _lastRender = renderArgs.RenderingTime;
            Point location = new Point(0,0);
            Vector toMouse = _lastMousePosition - location;
            double followForce = 1.00;
            _rectangleVelocity += toMouse * followForce;
            double drag = 0.9;
            _rectangleVelocity *= drag;
            location += _rectangleVelocity * deltaTime;
            Canvas.SetLeft(followRectangle, location.X);
            Canvas.SetTop(followRectangle, location.Y);
        }
    }
}