private void chkSelect_CheckedChanged(object sender, EventArgs e)        {            try            {                if (this.dgvArchivesData.Rows.Count > 0)                {                    for (int i = 0; i < this.dgvArchivesData.Rows.Count; i++)                    {                        if ((bool)this.dgvArchivesData.Rows[i].Cells[0].EditedFormattedValue)                        {                            this.dgvArchivesData.Rows[i].Cells[0].Value = false;                        }                        else                        {                            this.dgvArchivesData.Rows[i].Cells[0].Value = true;                        }                    }                }            }            catch(Exception ex)            {            }        }