using System;

using System.Collections.Generic;

using System.Linq;

public class Program

{ 

    public class Person

    {public string FirstName

    {set;get;}

     public string LastName

     {set;get;}

     public int Age

     {set;get;}

     public Person()

     {

     }

     public Person(string a, string b, int c)

     {FirstName=a;

      LastName=b;

      Age=c;

     }

     public void Print()

     {

         Console.WriteLine("{0},{1},{2}",this.FirstName,this.LastName,this.Age);

     }

    }

    public static void Main()

    {   Person a= new Person("Боряна","Колева",24);

        Person b= new Person("Красимир","Стояв",13);

        Person c= new Person("Стоян","Резбаров",67);

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

        person.Add(a);

        person.Add(b);

        person.Add(c);

        List <Person> sortedList= person

        .OrderBy(y=>y.Age).ToList();

        foreach(Person A in sortedList)A.Print();

        List <Person> sortedList1= person

        .OrderBy(z=>z.FirstName)

        .ThenBy(z=>z.LastName).ToList();

        foreach(Person B in sortedList1)B.Print();

        //нямам visual studio, за да го разработя в отделен файл

    }

}