รบกวนดูโค้ดให้หน่อยคะ DataGridViewCheckBoxColumn ต้องการ remove ออกเฉยๆ คะพอติ๊ก checkbox แต่มันไม่ทำงานคะ

private void btnShip_Click(object sender, EventArgs e)
        {
            sb = new StringBuilder();
            sb.Remove(0, sb.Length);


            sb.Append("SELECT [Receive Order].ROId,Customer.CustomerName, Customer.CustomerAddress,  ");
            sb.Append("[Receive Order].ROSDate, [Receive Order].TotalAmountOrder ");

            sb.Append("FROM [Receive Order] INNER JOIN ");
            sb.Append("Customer ON [Receive Order].CustomerId = Customer.CustomerId ");


            sb.Append("GROUP BY [Receive Order].ROId,Customer.CustomerName, Customer.CustomerAddress, ");
            sb.Append("[Receive Order].ROSDate, [Receive Order].TotalAmountOrder ");

            sb.Append(" ORDER BY [Receive Order].ROId ");
            string sqlProduct = sb.ToString();

            com = new SqlCommand();

            com.Parameters.Clear();
            com.CommandText = sqlProduct;
            com.CommandType = CommandType.Text;
            com.Connection = Conn;

            dr = com.ExecuteReader();
            if (dr.HasRows)
            {
                
                dgvShip.ReadOnly = false;
                chkCol.Name = "chkselect";
                chkCol.HeaderText = "  ";
                chkCol.HeaderCell.Style.Alignment = DataGridViewContentAlignment.MiddleCenter;
                chkCol.TrueValue = true;
                chkCol.Width = 10;
                chkCol.DisplayIndex = 18;
                chkCol.FlatStyle = FlatStyle.Popup;
                dgvShip.Columns.Add(chkCol);


                /*for (int i = dgvShip.Rows.Count - 1; i >= 0; i--)
                {
                    if ((bool)dgvShip.Rows[i].Cells[0].FormattedValue)
                    {
                        dgvShip.Rows.RemoveAt(i);
                    }
                }*/

                foreach (DataGridViewRow row in dgvShip.Rows)
                {
                    if ((bool)row.Cells[0].Value)
                    {
                        dgvShip.Rows.Remove(row);
                    }
                }

                //DataGridViewButtonColumn btn = new DataGridViewButtonColumn();
                //dgvShip.Columns.Add(btn);
                //btn.HeaderText = "Click Data";
                //btn.Text = "เรียบร้อย";
                //btn.Name = "btn";
                //btn.UseColumnTextForButtonValue = true;

                DataTable dtPoHard = new DataTable();
                dtPoHard.Load(dr);
                CheckResult = dtPoHard.Rows.Count;

                dgvShip.DataSource = dtPoHard;
                HeadData();



            }
            else
            {
                CheckResult = 0;
                dgvShip.DataSource = null;

            }
            lblCheckProduct.Text = "พบ : " + CheckResult.ToString() + " รายการ";
            dr.Close();
        }