private void CheckDueDate()
{
int result = 0;
foreach (DataGridViewRow row in dataGridView1.Rows)
{
var dateToCompare = Convert.ToDateTime(row.Cells[4].Value);
result = DateTime.Compare(dateToCompare, DateTime.Now);
if (result < 0)
{
row.Cells[4].Style = DataGridViewHelper.Danger();
}
}
}