public void Can_Convert_Rails_Zones_To_Iana_Zones()
        {
            var errors = 0;
            ICollection <string> railsZones = TZConvert.KnownRailsTimeZoneNames;

            foreach (string railsZone in railsZones)
            {
                if (TZConvert.TryRailsToIana(railsZone, out string ianaZone))
                {
                    Assert.NotNull(ianaZone);
                    Assert.NotEqual(string.Empty, ianaZone);
                }
                else
                {
                    errors++;
                    _output.WriteLine($"Failed to convert \"{railsZone}\"");
                }
            }

            Assert.Equal(0, errors);
        }