主题：[求助]用程序保存的图片都有黑边，能去掉么？

Dim bmp As new Bitmap(50, 50)
Dim g = graphics.fromimage(bmp)
Dim img = getimage("d:\test.jpg")
g.DrawImage(img, new Rectangle(0, 0, img.Width, img.Height), new Rectangle(20, 30, img.Width, img.Height), GraphicsUnit.Pixel)
bmp.Save("d:\test05.jpg")
bmp.dispose