Welcome to the Lounge

for (int i = 0; i <DataGridView.Rows.Count; i++)
            {
                try
                {
                    var values = DataGridView.Rows.Cast<DataGridViewRow>().Select(x => x.Cells[i].Value);
                    var sector1 = values.Count(x => Convert.ToInt32(x) >= 34 && Convert.ToInt32(x) <= 50);
var sector2 = values.Count(x => Convert.ToInt32(x) >= 51 && Convert.ToInt32(x) <= 100);
                    
                    DataGridView.Rows[i].Cells[4].Value = values.ToString();
                }
                catch (Exception ex)
                {
                   MessageBox.Show(ex.Message);
                }