定义ContractResolver ，继承 IContractResolver

using System;
using System.Reflection;
using Newtonsoft.Json.Serialization;
using SignalR;

namespace Loveboat.Configuration
{
    public class SignalRContractResolver : IContractResolver
    {
        private readonly Assembly _assembly;
        private readonly IContractResolver _camelCaseContractResolver;
        private readonly IContractResolver _defaultContractSerializer;

        public SignalRContractResolver()
        {
            _defaultContractSerializer = new DefaultContractResolver();
            _camelCaseContractResolver = new CamelCasePropertyNamesContractResolver();
            _assembly = typeof (Connection).Assembly;
        }

        #region IContractResolver Members

        public JsonContract ResolveContract(Type type)
        {
            if (type.Assembly.Equals(_assembly))
                return _defaultContractSerializer.ResolveContract(type);

            return _camelCaseContractResolver.ResolveContract(type);
        }

        #endregion
    }
}

配置应用：

var settings = new JsonSerializerSettings();
settings.ContractResolver = new SignalRContractResolver();
var serializer = JsonSerializer.Create(settings);
GlobalHost.DependencyResolver.Register(typeof (JsonSerializer), () => serializer);

var settings = new JsonSerializerSettings {ContractResolver = new SignalRContractResolver()};
var serializer = JsonSerializer.Create(settings);
builder.Register(c => serializer).As<JsonSerializer>();