public Student Update(Tables.Students s, Tables.StudentInfo si)
        {
            SID        = s.ID;
            Name       = si.Name;
            Login      = s.Login;
            Surname    = si.Surname;
            Password   = s.Password;
            Patronymic = si.Patronymic;

            return(this);
        }
 public Student(Tables.Students s, Tables.StudentInfo si)
 {
     Update(s, si);
 }