C#

int alertDays = 0; 
            
            foreach (DataGridViewRow row in keyEventsDataGridView.Rows)
            {
                DateTime alertDate = (DateTime) row.Cells[4].Value;
                
                foreach (DebtorDataSet.KeyEventsRow eventRow in debtorDataSet.KeyEvents)
                {
                    if(eventRow.Code.ToString() == row.Cells["KeyEventCode"].Value.ToString())
                        {
                            alertDays = ((int) eventRow.AlertDays);
                        }
                }

                alertDate.AddDays(0 - alertDays);

                if (DateTime.Compare(DateTime.Now, alertDate) < 0)
                {
                    row.Cells["Status"].Value = keyEventIconsImageList.Images[0];
                }
                else
                    row.Cells["Status"].Value = keyEventIconsImageList.Images[1];
            }