Derik Hammer introduces us to Join-Path:
It is obvious that the Join-Path method is easier to remember and faster to type. I use this method every time that I compare paths, even if they are full paths with file names.
The output of the Join-Path cmdlet can seem odd when using full paths but the comparison still functions properly.
This is pretty neat. The normal use of Join-Path is to combine a path with a filename to create a file path, but I like this usage of the cmdlet.