Necesito configuraciones JSON específicas por controlador en mi ASP.NET MVC 6 webApi. Encontré esta muestra que funciona (¡espero!) Para MVC 5:Forzar CamelCase en ASP.NET WebAPI por controlador

using System;
using System.Linq;
using System.Web.Http.Controllers;
using System.Net.Http.Formatting;
using Newtonsoft.Json.Serialization;

public class CamelCaseControllerConfigAttribute : Attribute, IControllerConfiguration 
{
    public void Initialize(HttpControllerSettings controllerSettings, HttpControllerDescriptor controllerDescriptor)
    {
        var formatter = controllerSettings.Formatters.OfType<JsonMediaTypeFormatter>().Single();
        controllerSettings.Formatters.Remove(formatter);

        formatter = new JsonMediaTypeFormatter
        {
            SerializerSettings = {ContractResolver = new CamelCasePropertyNamesContractResolver()}
        };

        controllerSettings.Formatters.Add(formatter);

    }
}