如何将16个图片框添加到Groupbox中

     PictureBox[] p = new PictureBox[15];
        for (int i = 0; i == 15; i++)
        {
            p[i] = new PictureBox();
            p[i].Name = "ItemNum" + i.ToString();
            p[i].Location = new Point(0, 0);
            p[i].Size = new Size(10, 10);
            p[i].Visible = true;
            p[i].BackColor = Color.Red;
            this.Controls.Add(p[i]);


        }
     PictureBox[] p = new PictureBox[15];