public Color ParentCanvasColor { get { if (parentCanvas != null && parentCanvas is DesignerCanvasNetDiag) { return Colors.Red; } return Colors.Transparent; } } public SolidColorBrush ParentCanvasColor { get { if (parentCanvas != null && parentCanvas is DesignerCanvasNetDiag) { return new SolidColorBrush(Colors.Red); } return new SolidColorBrush(Colors.Transparent); } }