Gets the character which is used as a hierarchy delimiter of separate levels of folder names.
The string containing a single character used to separate levels of hierarchy of folder names, or a null reference (Nothing in Visual Basic) if folder names are flat and nested folders are not supported.
The typical values returned by this property are: "/", ".", "\".
Note This property returns a null reference (Nothing in Visual Basic) if IsValid is false.
Folder Class | MailBee.ImapMail Namespace