public void CustomDateTimeTest()
        {
            var key = "Christmas";

            // Pick any type to use as test type
            var date  = new DateTime(2017, 12, 24);
            var value = date.ToString("dd/MM/yyyy");

            // Setup dictionary value provider
            var settingsLoader = new SettingsLoader(new DictionaryValueProvider(new Dictionary <string, string>
            {
                { key, value }
            }));

            settingsLoader.AddTypeConverter <DateTime>(x => DateTime.Parse(x, System.Globalization.CultureInfo.GetCultureInfo("da-DK")));

            var result = settingsLoader.Create <DateTime>(key);

            Assert.That(result, Is.Not.Null);
            Assert.That(result, Is.EqualTo(date));
        }