using System;

using System.Linq;

using System.IO;

using Microsoft.Extensions.Configuration;

public class Program

{

    public static void Main()

    {

        var configuration = GetConfiguration();

        var studentBirthdaysSection = configuration.GetSection("StudentBirthdays");

        foreach (var studentBirthdayObject in studentBirthdaysSection.GetChildren())

        {

            var kv = studentBirthdayObject.GetChildren().First();

            string studentName = kv.Key;

            string studentBirthday = kv.Value;

            Console.WriteLine("{0} - {1}", studentName, studentBirthday);

        }

    }

    // I can't load the configuration from a file here as ASP.NET Core would typically do

    // so I'm building it in memory

    private static IConfiguration GetConfiguration()

    {

        var cfgBuilder = new ConfigurationBuilder();

        string json = "{\"StudentBirthdays\":[{\"Anne\":\"01/11/2000\"},{\"Peter\":\"29/07/2001\"},{\"Jane\":\"15/10/2001\"},{\"John\":\"Not Mentioned\"}]}";

        var jsonStream = new MemoryStream(System.Text.Encoding.UTF8.GetBytes(json));

        cfgBuilder.AddJsonStream(jsonStream);

        return cfgBuilder.Build();

    }

}