C# WPF can some one fix this code?

public partial class MainWindow : Window
   {
       private Storyboard myStoryboard;
       private Storyboard myStoryboard2;
       public MainWindow()
       {
           InitializeComponent();
           //animation for the hide
           ThicknessAnimation myDoubleAnimation = new ThicknessAnimation();
           myDoubleAnimation.From = (textBlock3.Margin = new Thickness(378, 0, 0, 0));
           myDoubleAnimation.From = (SV.Margin = new Thickness(413, 0, 0, 0));
           myDoubleAnimation.To = (textBlock3.Margin = new Thickness(28, 0, 0, 0));
           myDoubleAnimation.To = (SV.Margin = new Thickness(35, 0, 0, 0));
           myDoubleAnimation.Duration = new Duration(TimeSpan.FromSeconds(0.5));
           myStoryboard = new Storyboard();
           myStoryboard.Children.Add(myDoubleAnimation);
           Storyboard.SetTargetName(myDoubleAnimation, textBlock3.Name);
           Storyboard.SetTargetProperty(myDoubleAnimation, new PropertyPath(Rectangle.MarginProperty));
           //animation for the show
           ThicknessAnimation myDoubleAnimation2 = new ThicknessAnimation();
           myDoubleAnimation2.From = (Margin = new Thickness(28, 0, 0, 0));
           myDoubleAnimation2.To = (Margin = new Thickness(378, 0, 0, 0));
           myDoubleAnimation2.Duration = new Duration(TimeSpan.FromSeconds(0.5));
           myStoryboard2 = new Storyboard();
           myStoryboard2.Children.Add(myDoubleAnimation2);
           Storyboard.SetTargetName(myDoubleAnimation2, textBlock3.Name);
           Storyboard.SetTargetProperty(myDoubleAnimation2, new PropertyPath(Rectangle.MarginProperty));

       }