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Weird exception "DependencyProperty.UnsetValue" when I have two instances of a graph on a form

Nov 9, 2010 at 6:51 PM

If I have two instances of a graphlayout control displayed on a control and I have enabled highlight triggers for mouse over events I get an unhandled exception.

The crash occurs at GraphElementControl.cs line 142

        internal static void SetIsHighlighted( DependencyObject obj, bool value )
            obj.SetValue( IsHighlightedPropertyKey, value );

this is the exception

"'{DependencyProperty.UnsetValue}' is not a valid value for property 'BorderBrush'."


Has anyone else seen this, or has anyone run into issues with multiple graphlayouts?