using System;

using System.Reflection;

using Newtonsoft.Json;

using Newtonsoft.Json.Linq;

public class Program

{

    public static void Main()

    {

        Sidebar sb = new Sidebar();

        string json = JsonConvert.SerializeObject(sb, Formatting.Indented);

        Console.WriteLine(json);

    }

}

​

[JsonConverter(typeof(NumberedPropertiesConverter))]

public class Sidebar

{

    public string Foo { get { return "foo property"; } }

    public string Hurry = "hurry";

    public string Dont_Spam_This_Button = "don't spam this button";

    public string Navigation = "navigation";

    public string Overview = "overview";

    public string Bar { get { return "bar property"; } }

}

​

class NumberedPropertiesConverter : JsonConverter

{

    public override bool CanConvert(Type objectType)

    {

        return true;

    }

    public override void WriteJson(JsonWriter writer, object value, JsonSerializer serializer)

    {

        JObject jo = new JObject();

        int count = 0;

        foreach (MemberInfo member in value.GetType().GetMembers())

        {

            object memberVal = null;

            if (member.MemberType == MemberTypes.Field)

            {

                memberVal = ((FieldInfo)member).GetValue(value);

            }

            else if (member.MemberType == MemberTypes.Property)

            {

                memberVal = ((PropertyInfo)member).GetValue(value);

            }

            else

            {

                continue;

            }

            JToken token = memberVal != null ? JToken.FromObject(memberVal, serializer) : null;

            jo.Add(count.ToString(), token);

            count++;

        }

        jo.WriteTo(writer);

    }

    public override bool CanRead

    {

        get { return false; }

    }

    public override object ReadJson(JsonReader reader, Type objectType, object existingValue, JsonSerializer serializer)

    {

        throw new NotImplementedException();

    }

}

​