using System;

using System.Collections.Generic;

using Newtonsoft.Json;

public class Program

{

    public static void Main()

    {

        string json = @"

            {

              ""Success"": true,

              ""Records"": [

                {

                  ""f_EMail"": ""test@me.com"",

                  ""f_FirstName"": ""firstname"",

                  ""f_LastName"": ""lastname"",

                  ""f_Country"": ""Luxembourg""

                },

                {

                  ""f_EMail"": ""test2@me.com"",

                  ""f_FirstName"": ""firstname2"",

                  ""f_LastName"": ""lastname2"",

                  ""f_Country"": null

                }

              ]

            }";

        Result result = JsonConvert.DeserializeObject<Result>(json);

        foreach (Record rec in result.Records)

        {

            Console.WriteLine("Email: " + rec.Email);

            Console.WriteLine("FirstName: " + rec.FirstName);

            Console.WriteLine("All properties:");

            foreach (var kvp in rec.Data)

            {

                Console.WriteLine("  " + kvp.Key + ": " + kvp.Value);

            }

            Console.WriteLine();

        }

    }

}

​

public class Result

{

    public bool Success { get; set; }

    public IEnumerable<Record> Records { get; set; }

}

​

public class Record

{

    [JsonExtensionData]

    public Dictionary<string, object> Data { get; set; }

    [JsonIgnore]

    public string Email

    {

        get { return GetDataValue(KnownRecordField.Email); }

        set { Data[KnownRecordField.Email] = value; }

    }

    [JsonIgnore]

    public string FirstName

    {

        get { return GetDataValue(KnownRecordField.FirstName); }

        set { Data[KnownRecordField.FirstName] = value; }

    }

    private string GetDataValue(string key)

    {

        object value;

        return Data.TryGetValue(key, out value) && value != null ? value.ToString() : null;

    }

}

​

public static class KnownRecordField

{

    public static readonly string Email = "f_EMail";

    public static readonly string FirstName = "f_FirstName";

}

​

​