Error with WPF 3.0

[Admin]

hi, there,
in program I get error message says following while no code of mine is in the list. Can anybody help? Thanks!

Unable to cast object of type 'System.Windows.Media.SolidColorBrush' to type 'System.Windows.DeferredReference'.
** at System.Windows.DependencyObject.GetEffectiveValue( EntryIndex entryIndex, DependencyProperty dp, RequestFlags requests)
** at System.Windows.DependencyObject.GetValueEntry(Entr yIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, RequestFlags requests)
** at System.Windows.DependencyObject.GetValue(Dependenc yProperty dp)
** at MS.Internal.Text.TextProperties.InitCommon(Depende ncyObject target)
** at MS.Internal.Text.TextProperties..ctor(FrameworkEle ment target, Boolean isTypographyDefaultValue)
** at System.Windows.Controls.TextBlock.GetLinePropertie s()
** at System.Windows.Controls.TextBlock.EnsureTextBlockC ache()
** at System.Windows.Controls.TextBlock.OnRender(Drawing Context ctx)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at MS.Internal.Helper.ArrangeElementWithSingleChild(U IElement element, Size arrangeSize)
** at System.Windows.Controls.ContentPresenter.ArrangeOv erride(Size arrangeSize)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.Primitives.BulletDecorator .ArrangeOverride(Size arrangeSize)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.Control.ArrangeOverride(Si ze arrangeBounds)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.StackPanel.ArrangeOverride (Size arrangeSize)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.ScrollContentPresenter.Arr angeOverride(Size arrangeSize)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.Grid.ArrangeOverride(Size arrangeSize)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.Controls.Control.ArrangeOverride(Si ze arrangeBounds)
** at System.Windows.FrameworkElement.ArrangeCore(Rect finalRect)
** at System.Windows.UIElement.Arrange(Rect finalRect)
** at System.Windows.ContextLayoutManager.UpdateLayout()
** at System.Windows.ContextLayoutManager.UpdateLayoutCa llback(Object arg)
** at System.Windows.Media.MediaContext.InvokeOnRenderCa llback.DoWork()
** at System.Windows.Media.MediaContext.FireInvokeOnRend erCallbacks()
** at System.Windows.Media.MediaContext.RenderMessageHan dlerCore(Object resizedCompositionTarget)
** at System.Windows.Media.MediaContext.AnimatedRenderMe ssageHandler(Object resizedCompositionTarget)
** at System.Windows.Threading.ExceptionWrapper.Internal RealCall(Delegate callback, Object args, Boolean isSingleParameter)
** at System.Windows.Threading.ExceptionWrapper.TryCatch When(Object source, Delegate callback, Object args, Boolean isSingleParameter, Delegate catchHandler)



أكثر... (https://forums.microsoft.com/MSDN/ShowPost.aspx?PostID=2621188&SiteID=1)

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