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

                      from pg in g.DefaultIfEmpty()

                      select new {Country = c, People = pg};

​

​

​

        foreach (var g in results)

        {

            Console.WriteLine("{0} - {1}", g.Country.CountryName, g.People == null ? "NULL" : g.People.Name);

        }

    }

}