NpgsqlInterval, NpgsqlDate, NpgsqlTimeZone, NpgsqlTime, NpgsqlTimeTZ, NpgsqlTimeStamp, NpgsqlTimeStampTZ.

In some cases the .NET type doesn't seem to be fully adequate for the Postgresql type (for example see comment on NpgsqlInterval).

But in many (most?) other cases I'm personally not clear on the value added over the .NET types, can someone help here?