FYI Studio/Blend crashing on some XAMLs with Windows 7 Theme

[Brian Sayatovic]

I have a particular XAML view that is crashing both Visual Studio 2010 and Expression Blend 4 when I open it.  The exception is a StackOverflowException.  It appears to be an infinitely recursive call (see attachment for actual stack screenshot):

• ...
• [Native to Managed Transition]
• [Managed to Native Transition]
• System.Windows.DependencyObject.ClearValueInternal(...)
• Telerik.Windows.Controls.StyleManager.OnThemeChanged(...)
• Telerik.Windows.PropertyMetaData.PropertChangeHook.OnPropertyChanged(...)
• System.Windows.DependencyObject.RaisePropertyChangeNotifications(...)
• System.Windows.DependencyObject.UpdateEffectiveValue(...)
• System.Windows.DependencyObject.InvlaidateProperty(...)
• MS.Internal.FrameworkCallbacks.InvalidateProperty(...)
• [Native to Managed Transition]
• [Managed to Native Transition]
• MS.Internal.XcpImports.SetValue(...)
• System.Windows.DependencyObject.SetValue(...)
• Telerik.Windows.Controls.Theme.Apply(...)
• Telerik.Windows.Controls.StyleManager.OnThemeChanged(...)
• Telerik.Windows.PropertyMetaData.PropertChangeHook.OnPropertyChanged(...)
• System.Windows.DependencyObject.RaisePropertyChangeNotifications(...)
• System.Windows.DependencyObject.UpdateEffectiveValue(...)
• System.Windows.DependencyObject.InvlaidateProperty(...)
• MS.Internal.FrameworkCallbacks.InvalidateProperty(...)
• ...

I pruned it down to just a RadTabControl in a UserControl with nothing else.  Having the Windows7 theme present in my project references makes it crash.  If I remove the reference, it works.

Then I tried a clean-room Blend project with the same thing -- singular RadTabControl with Windows7 theme -- and it did NOT crash.

So, unfortunately, I can't reproduce this in a clean-room where I can post the example for Telerik to fix.  I'm hoping that someone has also experienced this and knows a solution.  Perhaps this may also give hope to future web searchers looking for people with the same problem.

[Petar Mladenov]

Hi Brian Sayatovic,

 Could you please make sure all telerik assemblies in the application have equal version? Then, if this doesn't help , is it possible for you to capture a video showing how this issue is reproduced since you are not able to provide any code ? This will be highly appreciated and we would be better able to investigate this. Thank you in advance.

Greetings,
Petar Mladenov
the Telerik team