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Continue to ChatXAML Intellisense Stops Working in Visual Studio 2010 http://www.dotnetspeak.com/silverlight/xaml-intellisense-stops-working-in-visual-studio-2010/
XAML Intellisense Stops Working in Visual Studio 2010 http://www.dotnetspeak.com/silverlight/xaml-intellisense-stops-working-in-visual-studio-2010/