public class Family
    {
        public List<Person> people;

        public void AddMember(Person member)
        {
            people.Add(member);
        }

        public Person GetOldestMember()
        {
            var oldestMember = people.OrderByDescending(p => p.age).FirstOrDefault();
            return oldestMember;
        }
    }

var numOfPeople = int.Parse(Console.ReadLine());

        while (numOfPeople > 0)
        {
            var tokens = Console.ReadLine().Split(' ');
            var name = tokens[0];
            var age = int.Parse(tokens[1]);

            var person = new Person(name, age);
            Family.AddMember(person);
        }