public int Opacity {get; set;}
'Declaration Public Property Opacity As Integer
'Usage Dim instance As RasterPaintProperties Dim value As Integer instance.Opacity = value value = instance.Opacity
An Opacity value of 0 indicates that the image is completely transparent, while a value of 255 indicates that the image is completely opaque. A value of 128 indicates the image is 50 percent opaque, a value of 170 indicates the image is 72.5 percent opaque, and so on.
This property is only valid when the RasterPaintEngine.GdiPlus engine is used and has no effect on the other engines.