Current Directory and Parent Directory returned by ListDirectory.

Running sftpClient.ListDirectory(path) returns values . and ...
Whilst this is valid behaviour, special consideration has to be given whenever using this command to determine if we want these "relative-folders". There's also no flag (e.g. IsRelative) to easily filter; rather we have to filter on the folder's name to detect / exclude these.

$client.ListDirectory('/files') | Format-Table Name, Is* -AutoSize

Name                      IsSocket IsSymbolicLink IsRegularFile IsBlockDevice IsDirectory IsCharacterDevice IsNamedPipe
----                      -------- -------------- ------------- ------------- ----------- ----------------- -----------
..                           False          False         False         False        True             False       False
out                          False          False         False         False        True             False       False
.                            False          False         False         False        True             False       False
in                           False          False         False         False        True             False       False

Adding an option to hide these (either on the call to ListDirectory, or as a preference for the SftpClient itself would be helpful; or simply providing an IsRelative property on the SftpFile class to allow easy discrimination.

Start at the ListDirectory entry point and inspect the SftpFile representation shown by the issue. Compare the requested filtering option with an IsRelative-style discriminator, then verify that the chosen behavior lets callers exclude . and .. without name-based filtering. Done means the API exposes a documented, testable way to hide or identify both entries.