using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json.Linq;

​

public class Program

{

    public static void Main()

    {

        var json = @"

{events: [

    {

        title: ""New Year’s Day"",

        date: ""2012-01-02"",

        notes: ""Substitute day"",

        bunting: true

    }]}";

        var publicHolidayTransformer = new PublicHolidayJsonTransformer();

        publicHolidayTransformer.PostTransform = entries => entries.WithTitle("Meh2");

        var data = publicHolidayTransformer.Transform(JObject.Parse(json)).ToList();

        foreach (var item in data)

        {

            Console.WriteLine(item.Title);

        }

    }

}

​

public class TimeEntry

{

    public string Title

    {

        get;

        set;

    }

}

​

public interface IJsonTransformer<T>

{

    T Transform(JObject json);

}

​

public interface ITimeEntryJsonTransformer : IJsonTransformer<IEnumerable<TimeEntry>>

{

}

​

public class PublicHolidayJsonTransformer : ITimeEntryJsonTransformer

{

    public PublicHolidayJsonTransformer()

    {

        // Just return the collection in case this isn't initiated

        this.PostTransform = entries => entries;

    }

​

    public Func<IEnumerable<TimeEntry>, IEnumerable<TimeEntry>> PostTransform

    {

        get;

        set;

    }

​

    public IEnumerable<TimeEntry> Transform(JObject json)

    {

        var data = json.SelectToken("events").Select(e => e.ToObject<TimeEntry>());

        return PostTransform(data);

    }

}

​

public static class TimeEntryExtensions

{

    public static IEnumerable<TimeEntry> WithTitle(this IEnumerable<TimeEntry> entries, string title)

    {

        return entries.Select(e =>

        {

            e.Title = title;

            return e;

        }

​

        );

    }

}