ArgumentOutOfRange Exception in c#

private void openFileDialogOpenCSV_FileOk(object sender, CancelEventArgs e)
    {
        if (openFileDialogOpenCSV.CheckFileExists)
        {
            objStudents = new students();
            objSelectedStudents = new students();
            try
            {
                CsvFileReader objCsvFileReader = new CsvFileReader(openFileDialogOpenCSV.OpenFile());
                CsvRow objCsvRows = new CsvRow();
                while (objCsvFileReader.ReadRow(objCsvRows))
                {
                    student objStudent = new student(true, objCsvRows[0], objCsvRows[1], objCsvRows[2], objCsvRows[3], objCsvRows[4], objCsvRows[5]);
                    objStudents.Add(objStudent);
                    objSelectedStudents.Add(objStudent);
                }
                objCsvFileReader.Dispose();
                objCsvFileReader.Close();
                dataGridViewList.Rows.Clear();
                if ((objStudents != null) && (objStudents.Count > 0))
                {
                    panelList.BringToFront();
                    updateGridView();
                }
            }
            catch (Exception ex)
            {
                MessageBox.Show(ex.Message);
            }
        }
    }