C#动态生成PictureBox并指定图片的方法

int Num = 0;
PictureBox[] pb;
Num = 6;
pb = new PictureBox[Num];
for (int i = 1; i < Num; i++)
{
  pb[i] = new System.Windows.Forms.PictureBox();
  pb[i].BorderStyle = BorderStyle.FixedSingle;
  pb[i].Location = new Point(50 + i * 110, 100);
  pb[i].SizeMode = PictureBoxSizeMode.Zoom;
  pb[i].Image = Image.FromFile(@"D:\pic\" + i + ".png");
  FlowPanel1.Controls.Add(pb[i]);
}