DrawingContext.PushOpacityMask Method (Brush)
.NET Framework (current version)
Pushes the specified opacity mask onto the drawing context.
PresentationCore (in PresentationCore.dll)
public abstract void PushOpacityMask(
The opacity mask to apply to subsequent drawings. The alpha values of this brush determine the opacity of the drawing to which it is applied.
The mask is applied to all subsequent drawing commands until it is removed by the Pop operation.
For more information about creating opacity masks, see Opacity Masks Overview.
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Available since 3.0