Sane defaults to use for pure JSON Web APIs

FormatterConfig.cs

public static class FormatConfig
{
    private class JsonContentNegotiator : IContentNegotiator
    {
        private readonly JsonMediaTypeFormatter _jsonFormatter;

        public JsonContentNegotiator(JsonMediaTypeFormatter formatter)
        {
            _jsonFormatter = formatter;
        }

        public ContentNegotiationResult Negotiate(Type type, HttpRequestMessage request, IEnumerable<MediaTypeFormatter> formatters)
        {
            return new ContentNegotiationResult(_jsonFormatter, new MediaTypeHeaderValue("application/json"));
        }
    }

    public static void Configure(HttpConfiguration configuration)
    {
        configuration.Services.Replace(typeof(IContentNegotiator), new JsonContentNegotiator(new JsonMediaTypeFormatter
        {
            Indent = false,
            UseDataContractJsonSerializer = true,
            SerializerSettings = new JsonSerializerSettings
            {
                ConstructorHandling = ConstructorHandling.Default,
                DateFormatHandling = DateFormatHandling.IsoDateFormat,
                DateParseHandling = DateParseHandling.DateTime,
                DateTimeZoneHandling = DateTimeZoneHandling.Utc,
                Formatting = Formatting.None,
            }
        }));
    }
}