例如：
            Point p1 = new Point(50, 200);
            Point p2 = new Point(300, 150);
            Point p3 = new Point(200, 200);
            Point p4 = new Point(400, 200);
            Point[] points ={ p1, p2, p3, p4 };
            g.DrawLines(new Pen(Color.Blue), points);

我如何动态的选择这几个点来画图呢？？ 每个点依据各自的条件确定到底画不画。
我暂时使用了Point.Empty来实现，比如
            bool b1 = false;
            bool b2 = true;
            if (b1 == true)
            {
                p1 = Point.Empty;
            }
            else if (b2 == true)
            {
                p2 = Point.Empty;
            }
但是这样就把我不想画出的点按照（0，0）来处理，并没有按照我预期的效果画出，版主们和众高手有没有什么好的方法啊？在线等ing。。。

[[it] 本帖最后由 按时的地方 于 2008-4-10 16:33 编辑 [/it]]

Point[] points = new Point[4];
            //points[0] = p1;
            //points[1] = p2;
            //points[2] = p3;
            //points[3] = p4;
            int i = 0;
            bool b1 = true;
            bool b2 = true;
            bool b3 = true;
            bool b4 = false;

            if (b1)
            {
                points[i] = p1;
                i++;
            }
            else if (b2)
            {
                points[i] = p2;
                i++;
            }
            else if (b3)
            {
                points[i] = p3;
                i++;
            }
            else if (b4)
            {
                points[i] = p4;
                i++;
            }