On this pageOpacityMask Property Definition Namespace: Avalonia.Media Assembly: Avalonia.Base (in Avalonia.Base.dll) C#VBF#public IBrush? OpacityMask { get; set; }Public Property OpacityMask As IBrush Get Setmember OpacityMask : IBrush with get, set Property Value IBrush See Also Reference DrawingGroup Class Avalonia.Media Namespace