如何在windows窗体中绘制负象限中的矩形c＃

Question

我想在负象限（原点的左侧和顶部）绘制矩形......请帮助

Answer 1

只需在X和Y位置使用负数。

Graphics.DrawRectangle(Pens.Black, -100, -100, 100, 100);

Answer 2

Rectangle original = new Rectangle(10,10,50,50);
Rectangle negative = new Rectangle(original.Location.X - (original.Width * 2), original.Location.Y - (original.Height * 2), original.Width, original.Height);