DirectoryInfo.CreateSubdirectory Method (String, DirectorySecurity)

Creates a subdirectory or subdirectories on the specified path with the specified security. The specified path can be relative to this instance of the DirectoryInfo class.

Namespace: System.IO
Assembly: mscorlib (in mscorlib.dll)

public DirectoryInfo CreateSubdirectory (
	string path,
	DirectorySecurity directorySecurity
public DirectoryInfo CreateSubdirectory (
	String path, 
	DirectorySecurity directorySecurity
public function CreateSubdirectory (
	path : String, 
	directorySecurity : DirectorySecurity
) : DirectoryInfo
Not applicable.



The specified path. This cannot be a different disk volume or Universal Naming Convention (UNC) name.


The security to apply.

Return Value

The last directory specified in path.

Exception typeCondition


path does not specify a valid file path or contains invalid DirectoryInfo characters.


path is a null reference (Nothing in Visual Basic).


The specified path is invalid, such as being on an unmapped drive.


The subdirectory cannot be created.


A file or directory already has the name specified by path.


The specified path, file name, or both exceed the system-defined maximum length. For example, on Windows-based platforms, paths must be less than 248 characters, and file names must be less than 260 characters. The specified path, file name, or both are too long.


The caller does not have code access permission to create the directory.


The caller does not have code access permission to read the directory described by the returned DirectoryInfo object. This can occur when the path parameter describes an existing directory.


path contains a colon character (:) that is not part of a drive label ("C:\").

Any and all directories specified in path are created, unless some part of path is invalid. The path parameter specifies a directory path, not a file path. If the subdirectory already exists, this method does nothing.


Path names are limited to 248 characters.

For a list of common I/O tasks, see Common I/O Tasks.

Windows 98, Windows Server 2000 SP4, Windows Millennium Edition, Windows Server 2003, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP SP2, Windows XP Starter Edition

The Microsoft .NET Framework 3.0 is supported on Windows Vista, Microsoft Windows XP SP2, and Windows Server 2003 SP1.

.NET Framework

Supported in: 3.0, 2.0

Community Additions