public void reset() { textBox_search_keywords.Clear(); textBox_freeText.Clear(); listBox_lv4.Items.Clear(); listBox_lv3.Items.Clear(); listBox_lv2.Items.Clear(); consMgr.setExamLv1(listBox_lv1); listBox_selectedExamResult.Items.Clear(); foreach (PermissibleValueObj o in selectedExamResult) { listBox_selectedExamResult.Items.Add(o); } }