This file is indexed.

/usr/lib/mono/4.0/Npgsql.dll is in libmono-npgsql4.0-cil 2.10.8.1-1ubuntu2.

This file is owned by root:root, with mode 0o777.

It is a symlink to /usr/lib/mono/4.0/../gac/Npgsql/4.0.0.0__5d8b90d52f46fda7/Npgsql.dll