dotnet/Documentation/compatibility/wpf-textbox-selected-text-a...

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## WPF TextBox selected text appears a different color when the text box is inactive
### Scope
Edge
### Version Introduced
4.5
### Source Analyzer Status
Available
### Change Description
In .NET Framework 4.5, when a WPF text box control is inactive (it doesn't have focus),
the selected text inside the box will appear a different color than when the
control is active.
- [ ] Quirked
- [ ] Build-time break
### Recommended Action
The previous (.NET Framework 4.0) behavior may be restored by setting the
<xref:System.Windows.FrameworkCompatibilityPreferences.AreInactiveSelectionHighlightBrushKeysSupported>
property to `false`.
### Affected APIs
* `T:System.Windows.Controls.TextBox`
### Category
Windows Presentation Foundation (WPF)
<!-- breaking change id: 4 -->