manage the text of selectedbutton on mouseEnter in panel resizing animation

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C#

WPF

While resizing animation is applied text of button is lost.
I want to show the full text on button in panel while resizing animation to panel in moueseEnter event is applied on panel.

private void LeftPanelMouseEnter(object sender, MouseEventArgs e)
       {
               this.RegisterName(LeftPanel.Name, LeftPanel);
               DoubleAnimation dbani = new DoubleAnimation();
               dbani.From = 24;
               dbani.To = LeftPanelMaxWidth;
               dbani.Duration = new Duration(TimeSpan.FromSeconds(.7));
               Storyboard.SetTargetName(dbani, LeftPanel.Name);
               Storyboard.SetTargetProperty(dbani, new PropertyPath(Border.WidthProperty));
               Storyboard myWidthAnimatedButtonStoryboard = new Storyboard();
               myWidthAnimatedButtonStoryboard.Children.Add(dbani);
               myWidthAnimatedButtonStoryboard.Begin(LeftPanel);
               selectedButton.Margin = new Thickness(24, 0, 0, 0);
               diagnosisButton.Margin = new Thickness(24, 0, 0, 0);
               firmwareButton.Margin = new Thickness(24, 0, 0, 0);
               readerSettingButton.Margin = new Thickness(24, 0, 0, 0);
               logoPanel.Margin = new Thickness(24, 0, 0, 0);
                  }