private void buttonAddOption_Click(object sender, EventArgs e)
 {
     AddOptionForm aoptf = new AddOptionForm(ss.Sigma_x);
     if (aoptf.ShowDialog() == DialogResult.OK)
     {
         Option newOpt = aoptf.opt;
         dataGridViewOption.Rows.Add(new object[] { newOpt.Value, newOpt.StrikePrice, newOpt.DaysTilExpiry, newOpt.Type, PriceOption(newOpt) });
     }
 }
        private void buttonAddOption_Click(object sender, EventArgs e)
        {
            AddOptionForm aoptf = new AddOptionForm(ss.Sigma_x);

            if (aoptf.ShowDialog() == DialogResult.OK)
            {
                Option newOpt = aoptf.opt;
                dataGridViewOption.Rows.Add(new object[] { newOpt.Value, newOpt.StrikePrice, newOpt.DaysTilExpiry, newOpt.Type, PriceOption(newOpt) });
            }
        }