Backslashes in Powershell
-split splits on a regex by default. So it is the regex that requires escaping a backslash. You can tell PowerShell not to use a regex like so:
$path -split '\',-1,'SimpleMatch'-join is just taking whatever characters you supply to use as the delimiter to stick between the strings being joined.
-split is accepting a regular expression where backslash is special character, so it need to be escaped