using CsvHelper;

using CsvHelper.Configuration;

using Newtonsoft.Json;

using System;

using System.Collections.Generic;

using System.IO;

using System.Linq;

public class Program

{

    public static void Main()

    {

        var input = new Foo

        {

            Label = "My Foo",

            Bars = new List<Bar> {

                new Bar{Label="Bar2" },

                new Bar{Label="Bar1" },

                new Bar{Label="Bar3" },

            }

        };

​

        var json = JsonConvert.SerializeObject(input);

​

        var myObject = new CsvObject

        {

            Label = "My CSV object",

            FooString = json,

        };

​

        var result = "";

​

        // Writing into a string instead of a file for debug purpuse. 

        using (var stream = new MemoryStream())

            using (var reader = new StreamReader(stream))

            using (var writer = new StreamWriter(stream))

            using (var csv = new CsvWriter(writer))

        {

​

            csv.Configuration.RegisterClassMap<CsvObjectMap>();

​

            csv.WriteHeader<CsvObject>();                

            csv.NextRecord();

​

            csv.WriteRecord(myObject);                

            csv.NextRecord();

​

            writer.Flush();

            stream.Position = 0;

            result = reader.ReadToEnd();

        }

        Console.WriteLine(result);

    }

        private sealed class CsvObjectMap : ClassMap<CsvObject>

        {

            public CsvObjectMap()

            {

                Map( m => m.FooString );

                Map( m => m.Label );

            }

        }

        public class CsvObject

        {

            public string Label { get; set; }

            public string FooString { get; set; }

        }

        public class Foo

        {

            public string Label { get; set; }

            public List<Bar> Bars { get; set; }

        }

        public class Bar

        {

            public string Label { get; set; }

        }

}