public static void ManualInput(string id, string nameSurname, string departmanName, params Temp[] lectures) { UndergraduateStudent undergraduateStudent = new UndergraduateStudent(); undergraduateStudent.Id = id; undergraduateStudent.NameSurname = nameSurname; undergraduateStudent.DepartmanName = departmanName; foreach (Temp lecture in lectures) { undergraduateStudent.LectureAdd(lecture.code, lecture.name, lecture.mark, lecture.akts); } students.Add(undergraduateStudent); }