A pair of FileSystemItem objects consisting of the current item being processed and it's eventual target or destination item.

Target Platforms: Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2

Reference

FileSystemEventsSession Class
FileSystemEventsSession Members