protected abstract object CreateGradientBackend(GradientBackendHandler handler);
protected override object CreateGradientBackend(GradientBackendHandler handler) { return(handler.CreateLinear(xStart, yStart, xEnd, yEnd)); }
protected override object CreateGradientBackend(GradientBackendHandler handler) { return(handler.CreateRadial(cx0, cy0, radius0, cx1, cy1, radius1)); }