How to: Determine if a Directory is Read-Only in Visual Basic
The My.Computer.FileSystem.GetDirectoryInfo Method method returns a DirectoryInfo object with a Attributes property that can be queried to determine information about the directory, including whether it is read-only.
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To determine if a directory is read-only
The following example, which presents the above snippet in complete form, determines whether the directory testDirectory is read-only and reports the result in a message box.
If the directory does not exist, an exception is not thrown until the first time a property on the DirectoryInfo object is accessed.
The following conditions may cause an exception:
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 \\.\) (ArgumentException).
The path is not valid because it is Nothing (ArgumentNullException).
The path exceeds the system-defined maximum length (PathTooLongException).
A file or directory name in the path contains a colon (:) or is in an invalid format (NotSupportedException).
The user lacks necessary permissions to view the path (SecurityException).