public Student(long id, LevelOfCode loc)
 {
     this.student_id   = id;
     this.users_loc    = loc;
     this.current_exam = new Exam();
     this.Shedule      = new Dictionary <string, DateTime[]>();
     this.success      = 0;
 }
        public LevelOfCode users_loc; // уровень вложенности кода для пользователя

        public Student(long id, LevelOfCode loc)
        {
            this.student_id = id;
            this.users_loc  = loc;
        }