如何绘制平行四边形集合线

FillPolygon可以执行以下操作:

protected override void OnPaint(PaintEventArgs e) {
  base.OnPaint(e);
  e.Graphics.Clear(Color.White);

  int x = 10;
  int y = 10;
  int width = 148;
  int height = 64;
  int lean = 36;
  Color[] colors = new[] { Color.FromArgb(169, 198, 254),
                           Color.FromArgb(226, 112, 112),
                           Color.FromArgb(255, 226, 112),
                           Color.FromArgb(112, 226, 112),
                           Color.FromArgb(165, 142, 170)};

  e.Graphics.SmoothingMode = SmoothingMode.AntiAlias;
  for (int i = 0; i < colors.Length; ++i) {
    using (SolidBrush br = new SolidBrush(colors[i])) {
      e.Graphics.FillPolygon(br, new Point[] { new Point(x, y),
                                               new Point(x + lean, y + height),
                                               new Point(x + lean + width, y + height),
                                               new Point(x + width, y)});
      x += width;
    }
  }
}