System.Drawing.Drawing2D.GraphicsPath.AddRectangles C# (CSharp) Method

        public void AddRectangles(Rectangle[] rects)
        {
            if (rects == null)
                throw new ArgumentNullException ("rects");

            foreach (var rect in rects)
                AddRectangle (rect);
        }

        public MapTimelineControl()
        {
            this.m_mtsSeek = new MapTimelineSeekButton();

            this.TimelineButtons = new List<MapObject>();

            GraphicsPath gpButtonPath = new GraphicsPath();
            gpButtonPath.AddLines(new Point[] { new Point(0, 6), new Point(6, 12), new Point(6, 6), new Point(12, 12), new Point(12, 0), new Point(6, 6), new Point(6, 0), new Point(0, 6) });
            gpButtonPath.CloseFigure();
            MapTimelineControlButton mtbButton = new MapTimelineControlButton(gpButtonPath, MapTimelineControlButtonType.Rewind);
            mtbButton.TimelineControlButtonClicked += new MapTimelineControlButton.TimelineControlButtonClickedHandler(mtbButton_TimelineControlButtonClicked);
            this.TimelineButtons.Add(mtbButton);

            gpButtonPath = new GraphicsPath();
            gpButtonPath.AddRectangles(new Rectangle[] { new Rectangle(0, 0, 4, 12), new Rectangle(8, 0, 4, 12) });
            mtbButton = new MapTimelineControlButton(gpButtonPath, MapTimelineControlButtonType.Pause);
            mtbButton.TimelineControlButtonClicked += new MapTimelineControlButton.TimelineControlButtonClickedHandler(mtbButton_TimelineControlButtonClicked);
            this.TimelineButtons.Add(mtbButton);

            gpButtonPath = new GraphicsPath();
            gpButtonPath.AddLines(new Point[] { new Point(1, 0), new Point(1, 12), new Point(9, 6), new Point(1, 0) });
            gpButtonPath.CloseFigure();
            mtbButton = new MapTimelineControlButton(gpButtonPath, MapTimelineControlButtonType.Play);
            mtbButton.ForegroundColour = Color.LightSeaGreen;
            mtbButton.TimelineControlButtonClicked += new MapTimelineControlButton.TimelineControlButtonClickedHandler(mtbButton_TimelineControlButtonClicked);
            this.TimelineButtons.Add(mtbButton);

            gpButtonPath = new GraphicsPath();
            gpButtonPath.AddLines(new Point[] { new Point(0, 0), new Point(0, 12), new Point(6, 6), new Point(6, 12), new Point(12, 6), new Point(6, 0), new Point(6, 6), new Point(0, 0) });
            gpButtonPath.CloseFigure();
            mtbButton = new MapTimelineControlButton(gpButtonPath, MapTimelineControlButtonType.FastForward);
            mtbButton.TimelineControlButtonClicked += new MapTimelineControlButton.TimelineControlButtonClickedHandler(mtbButton_TimelineControlButtonClicked);
            this.TimelineButtons.Add(mtbButton);

            this.SelectedButtonType = MapTimelineControlButtonType.Play;
            this.m_flControlChangeSpeed = 2.0F;
        }