InvariantCulture is useful when comparing / sorting human language strings in a culturely correct way. It handles things like accented letters in a way that makes sense to humans (e.g., 'a' should be sorted next to 'á', rather than after 'z').
Ordinal looks just at the raw code points of the characters. As such, it is recommended for use in cases when comparing system strings (file paths, command line parameters, config settings, etc.). Since it doesn't need to use the culture specific sorting rules, this method can often be faster.
For more information, see https://stackoverflow.com/questions/492799/difference-between-invariantculture-and-ordinal-string-comparison (and other related questions)
Fixed: Listing drives on Windows now work if you have 1 or more drives
that are 'not ready' or when a drive' details could not be retrieved
while building the list (such entries are simply ignored)
Fixed: Trying to 'expand' a folder using the picker that became
unavailable in the meanwhile will now properly show a client side error
(instead of silently fail)
Kenneth Hsu