static PostmarkClient()
        {
            _settings = new JsonSerializerSettings
            {
                MissingMemberHandling = MissingMemberHandling.Ignore,
                NullValueHandling     = NullValueHandling.Include,
                DefaultValueHandling  = DefaultValueHandling.Include
            };

            _settings.Converters.Add(new UnicodeJsonStringConverter());
            _settings.Converters.Add(new NameValueCollectionConverter());
            _serializer = new PostmarkSerializer(_settings);
        }
        static PostmarkClient()
        {
            _settings = new JsonSerializerSettings
            {
                MissingMemberHandling = MissingMemberHandling.Ignore,
                NullValueHandling = NullValueHandling.Include,
                DefaultValueHandling = DefaultValueHandling.Include
            };

            _settings.Converters.Add(new UnicodeJsonStringConverter());
            _settings.Converters.Add(new NameValueCollectionConverter());
            _serializer = new PostmarkSerializer(_settings);
        }