Animations Silverlight

    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'>
    
        
            
                               Storyboard.TargetName="btnGrow" Storyboard.TargetProperty="Width"
                From="150" To="300" Duration="0:0:5">
            
        

        
    

//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();
            this.Loaded += new RoutedEventHandler(MainPage_Loaded);
            btnGrow.SizeChanged += new SizeChangedEventHandler(btnGrow_SizeChanged);
        }
        void btnGrow_SizeChanged(object sender, SizeChangedEventArgs e)
        {
            if (btnGrow.ActualWidth == 300)
            {
                btnGrow.Content = "This button now shrinks";
            }
        }
        void MainPage_Loaded(object sender, RoutedEventArgs e)
        {
            Grow.Begin();
        }
    }
}