img[0] = Image.FromFile("img/2.jpg");
img[1] = Image.FromFile("img/3.jpg");
img[2] = Image.FromFile("img/1.jpg");
pictureBox1.SizeMode = PictureBoxSizeMode.StretchImage;
现在是这样的 要怎么改啊 要文件夹里所有后缀是jpg的图片！！！！