using System;

using System.Collections.Generic;

using System.Text;

using Newtonsoft.Json.Linq;

​

class Program

{

    static void Main(string[] args)

    {

        string jsonString = $@"{{

            ""i4go_expirationyear"": ""2018"",

            ""i4go_cardtype"": ""VS"",

            ""i4go_response"": ""SUCCESS"",

            ""i4go_expirationmonth"": ""04"",

            ""i4go_uniqueid"": ""1111x1x1x1x1x1x1"",

            ""otn"": {{

                ""cvv2indicator"": 1,

                ""apiformat"": 0,

                ""expirationmonth"": ""04"",

                ""errorindicator"": ""N"",

                ""authorization"": """",

                ""longerror"": """",

                ""cardnumber"": """",

                ""errortext"": """",

                ""apisignature"": ""$"",

                ""cgi_host"": ""http://127.0.0.1:16448"",

                ""cvv2code"": """",

                ""secondaryerrorcode"": 0,

                ""validavs"": """",

                ""clerk"": 0,

                ""primaryerrorcode"": 0,

                ""apioptions"": ""ALLDATA"",

                ""functionrequestcode"": ""E0"",

                ""time"": ""000000"",

                ""tokenserialnumber"": 0,

                ""verbose"": true,

                ""primaryamount"": 0,

                ""secondaryamount"": 0,

                ""expirationyear"": 2018,

                ""zipcode"": """",

                ""responsecode"": """",

                ""username"": ""n/a"",

                ""postfinishtime"": 1445822349264,

                ""timeout"": 25,

                ""expirationdate"": 0,

                ""cfhttp_statuscode"": ""200 OK"",

                ""rawline2"": ""0,\""9999999098\"",\""VS\"",\""\"",0.00,\""\"",\""\"",\""\"""",

                ""rawline1"": ""OK"",

                ""reference"": ""WT0000253592"",

                ""result"": ""OTN"",

                ""tagtotaltime"": 827,

                ""tagstarttime"": 1445822348437,

                ""tranid"": 0,

                ""invoice"": 9999999098,

                ""cardtype"": ""VS"",

                ""trackinformation"": """",

                ""shorterror"": """",

                ""uniqueid"": ""1111x1x1x1x1x1x1"",

                ""customername"": """",

                ""tagfinishtime"": 1445822349264,

                ""merchantid"": 0,

                ""streetaddress"": """",

                ""poststarttime"": 1445822348437,

                ""date"": 123099,

                ""cvv2valid"": """",

                ""preauthorizedamount"": 0,

                ""options"": """",

                ""vendor"": ""i4GO"",

                ""posttotaltime"": 827

            }},

            ""i4go_responsecode"": ""1""

        }}";

        Console.Write(JsonToCsv(jsonString));

    }

​

    public static string JsonToCsv(string json)

    {

        JObject obj = JObject.Parse(json);

        Dictionary<string, string> dict = new Dictionary<string, string>();

        AddToDictionary(obj, "", dict);

        StringBuilder sb = new StringBuilder();

        //sb.AppendLine("Field,Data Type,Length");

        foreach (KeyValuePair<string, string> pair in dict)

        {

            sb.AppendLine(pair.Key + "," + pair.Value);

        }

​

        return sb.ToString();

    }

​

    private static void AddToDictionary(JObject obj, string prefix, Dictionary<string, string> dict)

    {

        foreach (var property in obj)

        {

            string key = prefix + property.Key;

            if (property.Value.Type == JTokenType.Object)

            {

                AddToDictionary((JObject)property.Value, key + ".", dict);

            }

            else

            {

                string value = property.Value.ToString();

                string type = property.Value.Type.ToString();

                dict[key] = type + "," + value.Length;

            }

        }

    }

}