2017-10-07 06:49:57 +08:00
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## Crash in Selector when removing an item from a custom INCC collection
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### Scope
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Minor
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### Version Introduced
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4.7
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### Version Reverted
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4.7.1
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### Source Analyzer Status
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NotPlanned
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### Change Description
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2018-02-13 06:46:07 +08:00
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An `T:System.InvalidOperationException` can occur in the following scenario:
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2017-10-07 06:49:57 +08:00
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* The ItemsSource for a `T:System.Windows.Controls.Primitives.Selector` is a collection with a custom
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implementation of `T:System.Collections.Specialized.INotifyCollectionChanged`.
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* The selected item is removed from the collection.
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* The `T:System.Collections.Specialized.NotifyCollectionChangedEventArgs` has
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`P:System.Collections.Specialized.NotifyCollectionChangedEventArgs.OldStartingIndex` = -1
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(indicating an unknown position).
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The exception's callstack begins
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at System.Windows.Threading.Dispatcher.VerifyAccess()
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at System.Windows.DependencyObject.GetValue(DependencyProperty dp)
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at System.Windows.Controls.Primitives.Selector.GetIsSelected(DependencyObject element)
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This exception can occur in .Net 4.5 if the application has more than one Dispatcher thread.
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In .Net 4.7 the exception can also occur in applications with a single Dispatcher thread.
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The issue is fixed in .Net 4.7.1.
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- [ ] Quirked
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- [ ] Build-time break
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### Recommended Action
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Upgrade to .Net 4.7.1.
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### Affected APIs
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* Not detectable via API analysis
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### Category
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Windows Presentation Foundation (WPF)
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<!--
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### Original Bug
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424259
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-->
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