using System;

using System.Collections.Generic;

using System.Linq;

​

//create Person that contains age, name, number

public class Person

{

    private string name;

    private short age;

    private string number;

​

    //constructor

    public Person(string name, short age, string number)

    {

        this.name = name;

        this.age = age;

        this.number = number;

    }

​

    public string Name

    {

        get { return name; }

        set { name = value; }

    }

​

    public short Age

    {

        get { return age; }

        set { age = value; }

    }

    public string Number

    {

        get { return number; }

        set { number = value; }

    }

}

​

public class main

{

    public static void Main()

    {

        //Add people to the list

        List<Person> PersonList = new List<Person>();

        PersonList.Add(new Person("Monica Brown",31,"706-832-3486"));

        PersonList.Add(new Person("Joshua Thomas",30,"281-865-1288"));

        PersonList.Add(new Person("Brenda Brown",57,"706-726-0148"));

        //sort by age

        List<Person> personByAge = PersonList.OrderBy(person => person.Age).ToList();

        foreach (Person person in personByAge)

        Console.WriteLine(person.Name + ":" + person.Age + "years old");

    }

}