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();

                var errors = (HttpError)httpError["ModelState"];

                foreach (var error in errors)
                {
                    foreach (var message in error.Value as string[])
                    {
                        modelState.AddModelError(error.Key, message);
                    }
                }

                return modelState;
            }

            return null;
        }
    }