What folder? There's no folder in your code.
Anyway, it should be:



See documentation:
https://winscp.net/eng/docs/library_session_getfiles#remotepath

When executing GetFiles on a server with an empty directory, WinSCP is sending a command to delete the actual directory the files are stored in. Here's how I have the command setup:

session.GetFiles("/", _mySettings.DownloadDirectory, true, transferOptions)

This is not the behavior I expected.