using System;

using System.Collections.Generic;

using Newtonsoft.Json;

using System.Net.Http;

using Newtonsoft.Json.Linq;

using System.Linq;

using System.Globalization;

public class Program

{

    public static void Main()

    {

        Console.WriteLine("Hello World");

        var recofs = new string[] {"567376488", "567087622"};

        var filters = new List<FilterDto>

        {

            new FilterDto

            {

                Field = "DellRecofNumOrder",

                Operator = 5,

                Value = JsonConvert.SerializeObject(recofs),

                SubOperator = 0,

                NullValue = false

            }

        };

​

        var obj = new

        {

            filters

        };

         var formUrlEncodedContent = new FormUrlEncodedContent(Extension.ToKeyValue(obj));

         Console.WriteLine(formUrlEncodedContent.ReadAsStringAsync().Result);

    }        

}

​

public class FilterDto

{

    public string Field { get; set; }

    public int Operator { get; set; }

    public int SubOperator { get; set; }

    public object Value { get; set; }

    public bool NullValue { get; set; }

}

​

public static class Extension

{

    public static IDictionary<string, string> ToKeyValue(object metaToken)

    {

        if (metaToken == null)

        {

            return null;

        }

​

        var token = metaToken as JToken;

        if (token == null)

        {

            return ToKeyValue(JObject.FromObject(metaToken));

        }

​

        if (token.HasValues)

        {

            var contentData = new Dictionary<string, string>();

            foreach (var child in token.Children().ToList())

            {

                var childContent = Extension.ToKeyValue(child);

                if (childContent != null)

                {

                    contentData = contentData.Concat(childContent)

                        .ToDictionary(k => k.Key, v => v.Value);

                }

            }

​

            return contentData;

        }

​

        var jValue = token as JValue;

        if (jValue == null || jValue.Value == null)

        {

            return null;

        }

​

        var value = jValue.Type == JTokenType.Date

            ? jValue.ToString("o", CultureInfo.InvariantCulture)

            : jValue.ToString(CultureInfo.InvariantCulture);

​

        return new Dictionary<string, string> { { token.Path, value } };

    }

}