using System;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var people = new[]

                {

                    new { Name = "Vernon", Gender = "Male", CountryCode = "GB" },

                    new { Name = "Carrie", Gender = "Female", CountryCode = "CA" },

                    new { Name = "Joanna", Gender = "Female", CountryCode = "US" },

                    new { Name = "Thomas", Gender = "Male", CountryCode = "ES" },

                    new { Name = "James", Gender = "Male", CountryCode = "GB" },

                    new { Name = "Elly", Gender = "Female", CountryCode = "US" }

                };

​

​

        var countries = new[]

        {

                new {CountryName = "United Kingdom", Code = "GB"},

                new {CountryName = "United States", Code = "US"},

                new {CountryName = "Canada", Code = "CA"},

                new {CountryName = "France", Code = "FR"},

                new {CountryName = "Spain", Code = "ES"}

        };

​

        var results = from c in countries

                      join p in people

                        on c.Code equals p.CountryCode

                      into g

                      select new { Country = c, PeopleInCountry = g};

        foreach (var r in results)

            {

                Console.WriteLine(r.Country.CountryName);

​

                foreach (var person in r.PeopleInCountry)

                {

                    Console.WriteLine("  {0}", person.Name);

                }

            }

​

    }

}