WPF C# Tutorial

  xmlns="http://schemas.microsoft.com/winfx/2006/xaml/presentation"
  xmlns:x="http://schemas.microsoft.com/winfx/2006/xaml"
  Title="Key-Frame Animation" Height="200" Width="300">
  
    
    
      
        
          
          
        
      

    
    
      
        
          
            
                              Storyboard.TargetName="rect"
                Storyboard.TargetProperty="Fill.GradientStops[0].Color"
                RepeatBehavior="Forever">