This file is indexed.

/usr/lib/mono/4.5/I18N.dll is in libmono-i18n4.0-cil 3.2.8+dfsg-4ubuntu1.

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

It is a symlink to /usr/lib/mono/4.5/../gac/I18N/4.0.0.0__0738eb9f132ed756/I18N.dll