c# Graphics 如何对不规则矩形进行填充

Point[] points = {new Point(0, 0), new Point(0 + 10) .......};(把你的矩形的所有点放在里边)
Brush brush = Brushes.Red;
g.FillPolygon(brush, points, FillMode.Winding);

g.Dispose();

用 Graphics.FillPath 方法