2017-04-18 07:52:04 +08:00
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## Items.Clear does not remove duplicates from SelectedItems
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2017-04-06 04:52:19 +08:00
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### Scope
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Minor
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### Version Introduced
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4.5
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### Version Reverted
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4.6.2
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### Source Analyzer Status
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NotPlanned
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### Change Description
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2017-04-21 02:19:05 +08:00
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Suppose a Selector (with multiple selection enabled) has duplicates in its
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<xref:System.Windows.Controls.Primitives.MultiSelector.SelectedItems?displayProperty=name>
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2017-04-06 04:52:19 +08:00
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collection - the same item appears more than once. Removing those items from the
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2017-04-21 02:19:05 +08:00
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data source (e.g. by calling Items.Clear) fails to remove them from
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<xref:System.Windows.Controls.Primitives.MultiSelector.SelectedItems?displayProperty=name>;
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only the first instance is removed. Furthermore, subsequent use of
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<xref:System.Windows.Controls.Primitives.MultiSelector.SelectedItems?displayProperty=name>
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(e.g. SelectedItems.Clear()) can encounter problems such as
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<xref:System.ArgumentException?displayProperty=name>, because
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<xref:System.Windows.Controls.Primitives.MultiSelector.SelectedItems?displayProperty=name>
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contains items that are no longer in the data source.
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2017-04-06 04:52:19 +08:00
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- [ ] Quirked
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- [ ] Build-time break
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### Recommended Action
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2018-03-01 08:06:28 +08:00
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Upgrade if possible to .NET Framework 4.6.2.
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2017-04-06 04:52:19 +08:00
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### Affected APIs
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* `P:System.Windows.Controls.Primitives.MultiSelector.SelectedItems`
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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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154627
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-->
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2017-04-18 07:52:04 +08:00
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<!-- breaking change id: 154 -->
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