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="imgDay"
                Storyboard.TargetProperty="Opacity"
                From="1" To="0" Duration="0:0:10" >
    
  

  
      
                
        
                
      

      
        
        
      

      
      
        
        
        
        
      
      
      
        
          
          
          
        

        Speed:
                      Minimum="0" Maximum="3" Value="1" ValueChanged="sldSpeed_ValueChanged">
              1.0
            
    
  

//File: Page.xaml.cs
using System;
using System.Collections.Generic;
using System.Linq;
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();
        }
        private void cmdStart_Click(object sender, RoutedEventArgs e)
        {
            fadeStoryboard.Begin();
        }
        private void cmdPause_Click(object sender, RoutedEventArgs e)
        {
            fadeStoryboard.Pause();
        }
        private void cmdResume_Click(object sender, RoutedEventArgs e)
        {
            fadeStoryboard.Resume();
        }
        private void cmdStop_Click(object sender, RoutedEventArgs e)
        {
            fadeStoryboard.Stop();            
        }
        private void cmdMiddle_Click(object sender, RoutedEventArgs e)
        {
            fadeStoryboard.Begin();
            fadeStoryboard.Seek(TimeSpan.FromSeconds(fadeAnimation.Duration.TimeSpan.TotalSeconds/2));
        }
        private void sldSpeed_ValueChanged(object sender, RoutedPropertyChangedEventArgs e)
        {
            if (sldSpeed == null) return;
            fadeStoryboard.SpeedRatio = sldSpeed.Value;
            lblSpeed.Text = sldSpeed.Value.ToString("0.0");
        }
    }
}