Невозможно анимировать свойство 'height' в 'system.windows.controls.border' с помощью 'system.windows.media.animation.doubleanimation'

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Сделать исключение

Не удается анимировать свойство "высота" в системе".Окна.Управления.Граница" с использованием " системы.Окна.Средства массовой информации.Анимация.DoubleAnimation'

Я думаю, что здесь есть исключение..

<doubleanimation duration="0:0:02.0" from="0" storyboard.targetname="br" storyboard.targetproperty="(FrameworkElement.Height)">

Это исключение:

System.Windows.Media.Animation.AnimationException was unhandled
  HResult=-2146233087
  Message=Cannot animate the 'Height' property on a 'System.Windows.Controls.Border' using a 'System.Windows.Media.Animation.DoubleAnimation'. For details see the inner exception.
  Source=PresentationCore
  StackTrace:
       at System.Windows.Media.Animation.AnimationStorage.OnCurrentTimeInvalidated(Object sender, EventArgs args)
       at System.Windows.Media.Animation.Clock.FireEvent(EventPrivateKey key)
       at System.Windows.Media.Animation.Clock.RaiseAccumulatedEvents()
       at System.Windows.Media.Animation.TimeManager.RaiseEnqueuedEvents()
       at System.Windows.Media.Animation.TimeManager.Tick()
       at System.Windows.Media.MediaContext.RenderMessageHandlerCore(Object resizedCompositionTarget)
       at System.Windows.Media.MediaContext.RenderMessageHandler(Object resizedCompositionTarget)
       at System.Windows.Media.MediaContext.Resize(ICompositionTarget resizedCompositionTarget)
       at System.Windows.Interop.HwndTarget.OnResize()
       at System.Windows.Interop.HwndTarget.HandleMessage(WindowMessage msg, IntPtr wparam, IntPtr lparam)
       at System.Windows.Interop.HwndSource.HwndTargetFilterMessage(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndWrapper.WndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam, Boolean& handled)
       at MS.Win32.HwndSubclass.DispatcherCallbackOperation(Object o)
       at System.Windows.Threading.ExceptionWrapper.InternalRealCall(Delegate callback, Object args, Int32 numArgs)
       at MS.Internal.Threading.ExceptionFilterHelper.TryCatchWhen(Object source, Delegate method, Object args, Int32 numArgs, Delegate catchHandler)
       at System.Windows.Threading.Dispatcher.LegacyInvokeImpl(DispatcherPriority priority, TimeSpan timeout, Delegate method, Object args, Int32 numArgs)
       at MS.Win32.HwndSubclass.SubclassWndProc(IntPtr hwnd, Int32 msg, IntPtr wParam, IntPtr lParam)
  InnerException: System.InvalidOperationException
       HResult=-2146233079
       Message='System.Windows.Media.Animation.DoubleAnimation' cannot use default destination value of 'NaN'.
       Source=PresentationCore
       StackTrace:
            at System.Windows.Media.Animation.DoubleAnimation.GetCurrentValueCore(Double defaultOriginValue, Double defaultDestinationValue, AnimationClock animationClock)
            at System.Windows.Media.Animation.DoubleAnimationBase.GetCurrentValue(Double defaultOriginValue, Double defaultDestinationValue, AnimationClock animationClock)
            at System.Windows.Media.Animation.DoubleAnimationBase.GetCurrentValue(Object defaultOriginValue, Object defaultDestinationValue, AnimationClock animationClock)
            at System.Windows.Media.Animation.AnimationStorage.GetCurrentPropertyValue(AnimationStorage storage, DependencyObject d, DependencyProperty dp, PropertyMetadata metadata, Object baseValue)
            at System.Windows.Media.Animation.AnimationStorage.OnCurrentTimeInvalidated(Object sender, EventArgs args)
       InnerException:

Пожалуйста, помогите мне, в чем причина этого исключения.

Что я уже пробовал:

<doubleanimation from="0" 

="" storyboard.targetname="br" storyboard.targetproperty="(FrameworkElement.Height)" duration="0:0:02.0">

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