FileSystemProxy.GetParentPath Method (String)
Returns the parent path of the provided path.
Assembly: Microsoft.VisualBasic (in Microsoft.VisualBasic.dll)
The path is not valid for one of the following reasons: it is a zero-length string; it contains only white space; it contains invalid characters; or it is a device path (starts with \\.\).
Path does not have a parent path because it is a root path.
path is Nothing.
The path exceeds the system-defined maximum length.
A file or directory name in the path contains a colon (:) or is in an invalid format.
This is a string operation; the file system is not examined.
Available since 2.0