Entity Framework 6 Provider for PostgreSQL

This is the Npgsql PostgreSQL provider for Entity Framework 6; note that this is the old, non-core version of EF. For the EF Core provider, see https://github.com/npgsql/efcore.pg.

Like non-core Entity Framework 6, this provider is no longer being maintained. It is unlikely that any enhancements or bug fixes will be worked upon, unless they're absolutely critical.

Why this fork

This forked repo will contain the fix of Cast null string parameters to varchar. It may contain other fixes as well.