Gets or sets the opacity of the SelectionBrush.
Public Property SelectionOpacity As Double
The opacity of the SelectionBrush. The default is 0.4.
If you set the SelectionOpacity to 0, the SelectionBrush is transparent and is not visible. If you set the SelectionOpacity to 1.0 or greater, the SelectionBrush is opaque and the selected text is not visible.
The following example creates a PasswordBox and sets the SelectionBrush property to green and the SelectionOpacity property to 0.5.
The preceding example produces output that is similar to the following illustration.
Selected text in a PasswordBox with SelectionOpacity set to 0.5
PasswordBox ClassSystem.Windows.Controls Namespace