using System;

using System.Linq;

​

public class Program

{

    public static void Main()

    {

        var customers = new [] {

            new {

                Id = 10000L,

                Name = "Johnny"

            }

        }.ToList();

        customers.Add(new {

            Id = 10001L,

            Name = "Elemar Jr."

        });

        foreach (var customer in customers) {

            Console.WriteLine("Customer #{0}: {1}", customer.Id, customer.Name); 

        }

    }

}