Npgsql 4.0.3 fixes various non-critical bugs. The list of changes is available here.
Npgsql 4.0.2 fixed assembly strong naming, which was accidentally broken in the 4.0.1 release. Some other bug fixes are included.
The list of changes is available here.
Npgsql 4.0.1 contains some important fixes for bugs found since the 4.0.0 release. It's recommended that everyone upgrade.
The list of changes is available here.
See the release notes.
Npgsql 3.2.7 contains some important fixes, and includes support for some PostgreSQL 10 features, notably SCRAM-SHA1-256. It's recommended that everyone upgrade.
The list of changes is available here.
Npgsql 3.2.6 contains some non-critical fixes, everyone is encouraged to upgrade.
The list of changes is available here.