using System;

using System.Collections.Generic;

public class Person {

    public string name { get; set; }

    public int age { get; set; }

    public override string ToString()

    {

        return $"{name} is {age} years old.";

    }

};

​

public class Program

{

    public static void Main()

    {

​

​

        var dudes = new List<Person>() {

            new Person(){ name="The Dude", age=47 },

            new Person(){ name="Lil Dude", age=12 } 

        };

        Console.WriteLine(string.Join(Environment.NewLine, dudes));

    }

}