public override void LayoutSubviews()
        {
            base.LayoutSubviews();
            BackgroundView.Frame  = Bounds.Inset(1, 1);
            CircleImageView.Frame = BackgroundView.Frame;
            SelectionLayer.Frame  = Bounds;

            switch (SelectionType)
            {
            case SelectionType.Middle:
                SelectionLayer.Path = UIBezierPath.FromRect(SelectionLayer.Bounds).CGPath;
                break;

            case SelectionType.LeftBorder:
                SelectionLayer.Path = UIBezierPath.FromRoundedRect(SelectionLayer.Bounds,
                                                                   UIRectCorner.TopLeft | UIRectCorner.BottomLeft,
                                                                   new CGSize(SelectionLayer.GetFs_width() / 2, SelectionLayer.GetFs_width() / 2)
                                                                   ).CGPath;
                break;

            case SelectionType.RightBorder:
                SelectionLayer.Path = UIBezierPath.FromRoundedRect(SelectionLayer.Bounds,
                                                                   UIRectCorner.TopRight | UIRectCorner.BottomRight,
                                                                   new CGSize(SelectionLayer.GetFs_width() / 2, SelectionLayer.GetFs_width() / 2)
                                                                   ).CGPath;
                break;

            case SelectionType.Single:
                var diameter = Math.Min(SelectionLayer.GetFs_height(), SelectionLayer.GetFs_width());
                SelectionLayer.Path = UIBezierPath.FromOval(new CGRect(SelectionLayer.GetFs_width() / 2 - diameter / 2,
                                                                       SelectionLayer.GetFs_height() / 2 - diameter / 2,
                                                                       diameter,
                                                                       diameter
                                                                       )).CGPath;
                break;

            default:
                break;
            }
        }