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