Recursively add files and directories to the archive directory named by the last component of the specified path.
A string that is the path to a directory which will be recursively included in the archive.
A ZipDirectoryItem that is the zip item container for the directory. Currently, the method always returns null.
The AddDirectory recursively collects all files and folders starting from the folder specified by the path parameter. The tree of directories and files is added to the archive directory named by the last component of a specified path.