Deserializing HttpError

gistfile1.cs

    public static class HttpErrorExtensions
    {
        public static ModelStateDictionary GetModelState(this HttpError httpError)
        {
            Ensure.Argument.NotNull(httpError, "httpError");
            object serialized;
            if (httpError.TryGetValue("ModelState", out serialized))
            {
                var modelState = new ModelStateDictionary();

                if (serialized is JObject)
                {
                    GetModelStateFromJObject((JObject)serialized, modelState);
                }
                else if (serialized is IDictionary<string, object>)
                {
                    GetModelStateFromDictionary((IDictionary<string, object>)serialized, modelState);
                }

                return modelState;
            }

            return null;
        }

        private static void GetModelStateFromJObject(JObject container, ModelStateDictionary modelState) 
        {
            foreach (var error in container)
            {
                foreach (var message in error.Value.Values<string>())
                {
                    modelState.AddModelError(error.Key, message);
                }
            }
        }

        private static void GetModelStateFromDictionary(IDictionary<string, object> dictionary, ModelStateDictionary modelState)
        {
            foreach (var error in dictionary)
            {
                foreach (var message in error.Value as string[])
                {
                    modelState.AddModelError(error.Key, message);
                }
            }
        }
    }