Cannot freeze this Storyboard timeline tree for use across threads.

[Shawn]

I'm trying to figure out a good way to get a theme applied at design time. I followed someones suggestion to create a class like this and added it to the resources in my App.xaml.

public class TelerikThemeManager : DependencyObject
{
    public TelerikThemeManager()
    {
        StyleManager.ApplicationTheme = new MetroTheme();
    }
}

I'm getting this error with RadExpander when i have that in place. The (few) other controls seem to be fine. Is there a good way of getting design time theme support application wide?

Cannot freeze this Storyboard timeline tree for use across threads.
   at System.Windows.Media.Animation.BeginStoryboard.Seal()
   at System.Windows.TriggerAction.Seal(TriggerBase containingTrigger)
   at System.Windows.TriggerActionCollection.Seal(TriggerBase containingTrigger)
   at System.Windows.TriggerBase.Seal()
   at System.Windows.Trigger.Seal()
   at System.Windows.TriggerCollection.Seal()
   at System.Windows.StyleHelper.SealTemplate(FrameworkTemplate frameworkTemplate, Boolean& isSealed, FrameworkElementFactory templateRoot, TriggerCollection triggers, ResourceDictionary resources, HybridDictionary childIndexFromChildID, FrugalStructList`1& childRecordFromChildIndex, FrugalStructList`1& triggerSourceRecordFromChildIndex, FrugalStructList`1& containerDependents, FrugalStructList`1& resourceDependents, ItemStructList`1& eventDependents, HybridDictionary& triggerActions, HybridDictionary& dataTriggerRecordFromBinding, Boolean& hasInstanceValues, EventHandlersStore& eventHandlersStore)
   at System.Windows.FrameworkTemplate.Seal()
   at System.Windows.FrameworkTemplate.System.Windows.ISealable.Seal()
   at System.Windows.StyleHelper.SealIfSealable(Object value)
   at System.Windows.ResourceDictionary.SealValue(Object value)
   at System.Windows.ResourceDictionary.RealizeDeferContent(Object key, Object& value, Boolean& canCache)
   at System.Windows.ResourceDictionary.GetValueWithoutLock(Object key, Boolean& canCache)
   at System.Windows.ResourceDictionary.GetValue(Object key, Boolean& canCache)
   at System.Windows.DeferredThemeResourceReference.GetValue(BaseValueSourceInternal valueSource)
   at System.Windows.DependencyPropertyChangedEventArgs.get_NewValue()
   at System.Windows.Controls.Control.OnTemplateChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.InvalidateProperty(DependencyProperty dp)
   at System.Windows.StyleHelper.InvalidateContainerDependents(DependencyObject container, FrugalStructList`1& exclusionContainerDependents, FrugalStructList`1& oldContainerDependents, FrugalStructList`1& newContainerDependents)
   at System.Windows.StyleHelper.DoThemeStyleInvalidations(FrameworkElement fe, FrameworkContentElement fce, Style oldThemeStyle, Style newThemeStyle, Style style)
   at System.Windows.StyleHelper.UpdateThemeStyleCache(FrameworkElement fe, FrameworkContentElement fce, Style oldThemeStyle, Style newThemeStyle, Style& themeStyleCache)
   at System.Windows.FrameworkElement.OnThemeStyleChanged(DependencyObject d, Object oldValue, Object newValue)
   at System.Windows.StyleHelper.GetThemeStyle(FrameworkElement fe, FrameworkContentElement fce)
   at System.Windows.FrameworkElement.UpdateThemeStyleProperty()
   at System.Windows.FrameworkElement.OnThemeStyleKeyChanged(DependencyObject d, DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.FrameworkElement.OnPropertyChanged(DependencyPropertyChangedEventArgs e)
   at System.Windows.DependencyObject.NotifyPropertyChange(DependencyPropertyChangedEventArgs args)
   at System.Windows.DependencyObject.UpdateEffectiveValue(EntryIndex entryIndex, DependencyProperty dp, PropertyMetadata metadata, EffectiveValueEntry oldEntry, EffectiveValueEntry& newEntry, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType)
   at System.Windows.DependencyObject.SetValueCommon(DependencyProperty dp, Object value, PropertyMetadata metadata, Boolean coerceWithDeferredReference, Boolean coerceWithCurrentValue, OperationType operationType, Boolean isInternal)
   at System.Windows.DependencyObject.SetValue(DependencyProperty dp, Object value)
   at Telerik.Windows.Controls.RadExpander.SetDefaultStyleKey() in c:\TB\102\WPF_Scrum\Current_HotFix\Sources\Development\Core\Controls\Expander\RadExpander.cs:line 577
   at Telerik.Windows.Controls.RadExpander.OnInitialized(EventArgs e) in c:\TB\102\WPF_Scrum\Current_HotFix\Sources\Development\Core\Controls\Expander\RadExpander.cs:line 571
   at System.Windows.FrameworkElement.TryFireInitialized()
   at System.Windows.FrameworkElement.EndInit()
   at Microsoft.Expression.DesignModel.InstanceBuilders.ClrObjectInstanceBuilder.EndInit(IInstanceBuilderContext context, ViewNode viewNode, DocumentCompositeNode compositeNode, ISupportInitialize supportInitialize)
   at Microsoft.Expression.DesignModel.InstanceBuilders.ClrObjectInstanceBuilder.InstantiateProperties(IInstanceBuilderContext context, ViewNode viewNode, DocumentCompositeNode compositeNode)
   at Microsoft.Expression.DesignModel.InstanceBuilders.ClrObjectInstanceBuilder.Instantiate(IInstanceBuilderContext context, ViewNode viewNode)
   at Microsoft.Expression.Platform.WPF.InstanceBuilders.FrameworkElementInstanceBuilder.Instantiate(IInstanceBuilderContext context, ViewNode viewNode)
   at MS.Internal.Services.DesignModeValueProviderService.DesignModeValueProviderBuilder.Instantiate(IInstanceBuilderContext context, ViewNode viewNode)
   at Microsoft.Expression.DesignModel.Core.ViewNodeManager.Instantiate(ViewNode viewNode)

[Shawn]

I finally resolved this by uninstalling the controls and re installing them.

[Rayne]

I'm using version 2011.2.912.40. Project references binaries that are stored in a solution folder, not the ones in the GAC. How Can I fix this error?

[Rayne]

More details:
Turns out I only get this error when I set the theme to Metro. The application uses Office_Blue globally via StyleManager.ApplicationTheme but I'm overriding it in certain areas of my application using StyleManager.Theme attached property. I can pick any theme but the Metro theme. And I've only encountered this error on the Expander.

[Petar Mladenov]

Hi Rayne,

 Could you please elaborate more on your scenario, especially what types of controls do you use? We tried to isolate this issue in a sample project but we did not succeed as you can see in the attached project. Is it possible for you to open a new support ticket with a project attached so that we would be able to investigate it locally ? Thank you in advance.

All the best,
Petar Mladenov
the Telerik team

[Rayne]

I was able to reproduce the problem in a sample application using the dlls my project references. Then I upgraded the sample project to the latest version that I have downloaded (2011.3.1129.40) and it works as expected. So maybe there is a problem with the version of the controls I'm using. When possible, I will update my project dlls and test again.