private void SetMembers(TripGroup tripGroup, int count)
        {
            Member member;

            for (int i = 0; i < count; i++)
            {
                member = new Member();
                SetExpenses(member, int.Parse(_sr.ReadLine()));
                tripGroup.AddMember(member);
            }
        }
        private void SetTripGroup()
        {
            string    line = string.Empty;
            TripGroup tripGroup;

            line = _sr.ReadLine();
            do
            {
                tripGroup = new TripGroup();
                SetMembers(tripGroup, int.Parse(line));
                line = _sr.ReadLine();
                _tripGroups.Add(tripGroup);
            } while (line != null && line != "0");
            _sr.Close();
        }