TextBoxBase.SelectionOpacity Property

.NET Framework 4.6 and 4.5

Gets or sets the opacity of the SelectionBrush.

Namespace:  System.Windows.Controls.Primitives
Assembly:  PresentationFramework (in PresentationFramework.dll)
XMLNS for XAML: http://schemas.microsoft.com/winfx/2006/xaml/presentation, http://schemas.microsoft.com/netfx/2007/xaml/presentation

public double SelectionOpacity { get; set; }
<object SelectionOpacity="double" .../>

Property Value

Type: System.Double
The opacity of the SelectionBrush. The default is 0.4.

If SelectionOpacity is set to 0, the SelectionBrush is transparent and is not visible. If SelectionOpacity is set to 1.0 or greater, the SelectionBrush is opaque and the selected text is not visible.

The following example creates a TextBox and adds the text, "This is some text." The example sets the SelectionBrush property to red and the SelectionOpacity property to 0.5 to customize the appearance of selected text.

<TextBox SelectionBrush="Red" SelectionOpacity="0.5"
         Foreground="Blue" CaretBrush="Blue">  
  This is some text.
</TextBox>

The following illustration shows the TextBox from the preceding example with its text selected.

Selected text in a TextBox with SelectionOpacity set to 0.5

TextBox with a red SelectionBrush

.NET Framework

Supported in: 4.6, 4.5, 4

.NET Framework Client Profile

Supported in: 4
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