dotnet/Documentation/compatibility/wpf-textbox-selected-text-appears-a-different-color-when-the-text-box-is-inactive.md

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)