Change the property of the control after doubleanimation

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C#

WPF

Hi...

I have used the DoubleAnimation to increase the width of a Panal from 24 to 240 for the duration of one second after this I want to set its width (240-24) i.e 216 but I am unable to do this. Can anyone tell me how can I achieve this. the code is given below...

this.RegisterName(LeftPanel.Name, LeftPanel);
           DoubleAnimation dbani = new DoubleAnimation();
           dbani.From = 24;
           dbani.To = 240;
           dbani.Duration = new Duration(TimeSpan.FromSeconds(1));
           Storyboard.SetTargetName(dbani, LeftPanel.Name);
           Storyboard.SetTargetProperty(dbani, new PropertyPath(Border.WidthProperty));
           Storyboard myWidthAnimatedButtonStoryboard = new Storyboard();
           myWidthAnimatedButtonStoryboard.Children.Add(dbani);
           myWidthAnimatedButtonStoryboard.Begin(LeftPanel);
           LeftPanel.width=216;

Thanks...