using System;

using System.Collections.Generic;

using System.Linq;

using Newtonsoft.Json;

using Newtonsoft.Json.Serialization;

public class Program

{

    public static void Main()

    {

        List<string> propertiesToSerialize = new List<string>(new string[]

        {

            "name",

            "masterString",

            "cruiseMode",

            "account",

        });

        ThirdPartyObject _objToSerialize = new ThirdPartyObject

        {

            MasterString = "Provider...",

            CruiseMode = 2,

            Account = "xxx\\yyy",

            Name = "AdWorksName",

            OtherStuff = "This property should not appear in the output."

        };

        DynamicContractResolver contractResolver = new DynamicContractResolver(propertiesToSerialize);

        string json = JsonConvert.SerializeObject(_objToSerialize, Formatting.Indented, new JsonSerializerSettings { ContractResolver = contractResolver });

        Console.WriteLine(json);

    }

}

​

public class DynamicContractResolver : CamelCasePropertyNamesContractResolver

{

    private IList<string> _propertiesToSerialize = null;

    public DynamicContractResolver(IList<string> propertiesToSerialize)

    {

        _propertiesToSerialize = propertiesToSerialize;

    }

    protected override IList<JsonProperty> CreateProperties(Type type, MemberSerialization memberSerialization)

    {

        IList<JsonProperty> properties = base.CreateProperties(type, memberSerialization)

            .Where(p => _propertiesToSerialize.Contains(p.PropertyName)).ToList();

        foreach (JsonProperty prop in properties)

        {

            prop.Order = _propertiesToSerialize.IndexOf(prop.PropertyName) + 1;

        }

        return properties.OrderBy(p => p.Order).ToList();

    }

}

​

class ThirdPartyObject

{

    public string MasterString { get; set; }

    public int CruiseMode { get; set; }

    public string Name { get; set; }

    public string Account { get; set; }

    public string OtherStuff { get; set; }

}

​