How to remove k__BackingField from json when Deserialize

The default WebApi serializer will add that "__BackingField:" syntax to c# auto-properties. Add this to your WebConfig in App_Start to get the cleaner looking json that you might be looking for.

using Newtonsoft.Json;
...

config.Formatters.JsonFormatter.SerializerSettings = new JsonSerializerSettings();

Remove [Serializable] from your class