Sorting a list

list_sort1.cs

public class Program
    {
        static void Main(string[] args)
        {
            Person p1 = new Person() { Name = "Person 1", Age = 34 };
            Person p2 = new Person() { Name = "Person 2", Age = 31 };
            Person p3 = new Person() { Name = "Person 3", Age = 33 };
            Person p4 = new Person() { Name = "Person 4", Age = 26 };

            List<Person> people = new List<Person> { p1, p2, p3, p4 };

            //Exception : Failed to compare two elements in the array
            people.Sort();
        }
    }

    public class Person
    {
        public string Name { get; set; }
        public int Age { get; set; }
    }