（C#）贝塞尔曲线画水滴

   protected override void OnPaint(PaintEventArgs e)
        {
            base.OnPaint(e);
            Graphics g = e.Graphics;

            Point p1 = new Point(50, 200);
            Point p2 = new Point(50, 150);
            Point p3 = new Point(120, 150);
            Point p4 = new Point(200, 200);

            Point p11 = new Point(50, 200);
            Point p22 = new Point(50, 250);
            Point p33 = new Point(120, 250);
            Point p44 = new Point(200, 200);

            GraphicsPath gp = new GraphicsPath();
            gp.AddBezier(p1, p2, p3, p4);
            gp.AddLine(p1, p4);
            g.FillPath(new SolidBrush(Color.Red), gp);

            gp = new GraphicsPath();
            gp.AddBezier(p11, p22, p33, p44);
            gp.AddLine(p11, p44);
            g.FillPath(new SolidBrush(Color.Red), gp);

        }