picturebox.image.save不更新EXIF缩略图?!
Dim a As GraphicsPictureBox1.Image = Image.FromFile("C:\1.JPG")MemoryGraphics = Graphics.FromImage(PictureBox1.Image)MemoryGraphics.FillRectangle(Brushes.White, New Rectangle(0, 0, 100, 100))PictureBox1.Image.Save("C:\2.JPG", System.Drawing.Imaging.ImageFormat.Jpeg)