public void RemoveMask() { var layer = new Layer(_image, "test", ImageType.Rgba); layer.AddAlpha(); _image.InsertLayer(layer, 0); var mask = layer.CreateMask(AddMaskType.White); layer.Mask = mask; Assert.AreEqual(mask, layer.Mask); layer.RemoveMask(MaskApplyMode.Discard); Assert.AreEqual(null, layer.Mask); }