retrieve image from database in c# windows application

Store Image in Database....         


            MemoryStream ms = new MemoryStream();
            Bitmap bmpImage = new Bitmap(pictureBox1.Image);

            bmpImage.Save(ms, System.Drawing.Imaging.ImageFormat.Jpeg);

            byte[] data = ms.GetBuffer();
            string ss= data.ToString();
            string cb = "insert into demopic values('"+ss+"','')";

Retrive image from database
                DataGridViewRow dr = dataGridView1.SelectedRows[0];
                 byte[] data = (byte[])dr.Cells["pic"].Value;
                 MemoryStream ms = new MemoryStream(data);
                 pictureBox1.Image = Image.FromStream(ms);