45 lines
1.4 KiB
Markdown
45 lines
1.4 KiB
Markdown
## Two-way data-binding to a property with a non-public setter is not supported
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### Scope
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Minor
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### Version Introduced
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4.5.1
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### Source Analyzer Status
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Planned
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### Change Description
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Attempting to data bind to a property without a public setter has never been a
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supported scenario. Beginning in the .NET Framework 4.5.1, this scenario will
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throw an <xref:System.InvalidOperationException?displayProperty=name>. Note that
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this new exception will only be thrown for apps that specifically target the
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.NET Framework 4.5.1. If an app targets the .NET Framework 4.5, the call will be
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allowed. If the app does not target a particular .NET Framework version, the
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binding will be treated as one-way.
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- [x] Quirked
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- [ ] Build-time break
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### Recommended Action
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The app should be updated to either use one-way binding, or expose the
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property's setter publicly. Alternatively, targeting the .NET Framework 4.5 will
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cause the app to exhibit the old behavior.
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### Affected APIs
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* `F:System.Windows.Data.BindingMode.TwoWay`
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### Category
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Windows Presentation Foundation (WPF)
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[More information](http://connect.microsoft.com/VisualStudio/feedback/details/773682/wpf-property-with-private-setter-is-updated-by-a-twoway-binding)
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<!--
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### Notes
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This is a good candidate for a non-code source analyzer since most cases of two-way binding will be defined in XAML
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-->
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<!-- breaking change id: 129 -->
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