using System;

using System.Collections;

using System.Collections.Generic;

using System.IO;

using CsvHelper;

using System.Globalization;

using System.Dynamic;

​

public class Program

{

    public static void Main()

    {

        var records = new List<dynamic>{

            (new Dictionary<string, object>{{"firstName", "Fred"}, {"lastName", "Flintstone"}}).ToExpando(), 

            (new Dictionary<string, object>{{"firstName", "Barnie"}, {"lastName", "Rubble"}}).ToExpando()};

        using (var writer = new StreamWriter(Console.OpenStandardOutput()))

        using (var csv = new CsvWriter(writer, CultureInfo.InvariantCulture))

        {

            csv.WriteRecords(records);

        }

    }

}

​

public static class Extensions

{

    // from: https://gist.github.com/theburningmonk/2221646

    /// <summary>

    /// Extension method that turns a dictionary of string and object to an ExpandoObject

    /// </summary>

    public static ExpandoObject ToExpando(this IDictionary<string, object> dictionary)

    {

        var expando = new ExpandoObject();

        var expandoDic = (IDictionary<string, object>)expando;

        // go through the items in the dictionary and copy over the key value pairs)

        foreach (var kvp in dictionary)

        {

            // if the value can also be turned into an ExpandoObject, then do it!

            if (kvp.Value is IDictionary<string, object>)

            {

                var expandoValue = ((IDictionary<string, object>)kvp.Value).ToExpando();

                expandoDic.Add(kvp.Key, expandoValue);

            }

            else if (kvp.Value is ICollection)

            {

                // iterate through the collection and convert any strin-object dictionaries

                // along the way into expando objects

                var itemList = new List<object>();

                foreach (var item in (ICollection)kvp.Value)

                {

                    if (item is IDictionary<string, object>)

                    {

                        var expandoItem = ((IDictionary<string, object>)item).ToExpando();

                        itemList.Add(expandoItem);

                    }

                    else

                    {

                        itemList.Add(item);

                    }

                }

​

                expandoDic.Add(kvp.Key, itemList);

            }

            else

            {

                expandoDic.Add(kvp);

            }

        }

​

        return expando;

    }

}