//populate the drop down list of user of type EndUser public void updateDdlist() { ddlAdminSelects.Items.Clear(); EndUserList.Clear(); ListOfUsersXMLHandler userHandler = new ListOfUsersXMLHandler(); string filename = "ListOfUsers.xml"; // FILENAME OF LIST OF USERS XML EndUserList = userHandler.ReadFile(filename); //reload the drop down list with student names for (int i = 0; i < EndUserList.Count; i++) { try { ddlAdminSelects.Items.Insert(i, EndUserList[i + 1].ScreenName); } catch (ArgumentOutOfRangeException x) { //do nothing if no user exits } } }