How do I save picturebox current image to database

sqlCon.Open();

string sqlSelectQuery = "SELECT * FROM MNDBagShellTb WHERE BsRefNo = @BsRefNo";
using (SqlCommand cmd = new SqlCommand(sqlSelectQuery, sqlCon))
{
   cmd.Parameters.AddWithValue("@BsRefNo", (txtRef.Text));

   using (SqlDataReader dr = cmd.ExecuteReader())
   {
      if (dr.Read())
      {
         //stockDetails
         imageBytes = dr["SbsImage"] as byte[];
         if (imageBytes != null)
         {
            using (var stream = new MemoryStream(imageBytes))
            pbxBagImg.Image = Image.FromStream(stream);
         }
      }
   }
}
   sqlCon.Close();