Split a 416x416 image into 16 pieces

private void button1_Click(object sender, EventArgs e)
        {
            Image img = Image.FromFile(@"C:\Users\Manuprasad M\Downloads\kristen-stewart_416x416.jpg"); 
            Bitmap[,] bmps = new Bitmap[4, 4];
            for (int i = 0; i < 4; i++)
                for (int j = 0; j < 4; j++)
                {
                    bmps[i, j] = new Bitmap(104, 104);
                    Graphics g = Graphics.FromImage(bmps[i, j]);
                    g.DrawImage(img, new Rectangle(0, 0, 104, 104), new Rectangle(j * 104, i * 104, 104, 104), GraphicsUnit.Pixel);
                    g.Dispose();
                }
            pictureBox1.Image = bmps[0, 0];
            pictureBox2.Image = bmps[0, 1];
            pictureBox3.Image = bmps[0, 2];
            pictureBox4.Image = bmps[0, 3];
            pictureBox5.Image = bmps[1, 0];
            pictureBox6.Image = bmps[1, 1];
            pictureBox7.Image = bmps[1, 2];
            pictureBox8.Image = bmps[1, 3];
            pictureBox9.Image = bmps[2, 0];
            pictureBox10.Image = bmps[2, 1];
            pictureBox11.Image = bmps[2, 2];
            pictureBox12.Image = bmps[2, 3];
            pictureBox13.Image = bmps[3, 0];
            pictureBox14.Image = bmps[3, 1];
            pictureBox15.Image = bmps[3, 2];
            pictureBox16.Image = bmps[3, 3];
        }