Gets or sets the opacity of the SelectionBrush.
Assembly: PresentationFramework (in PresentationFramework.dll)
The following example creates a TextBox and adds the text, "This is some text." The example sets the SelectionBrush property to red and the property to 0.5 to customize the appearance of selected text.
The following illustration shows the TextBox from the preceding example with its text selected.
Available since 4.0