GetDirectoryRoot Method

Directory.GetDirectoryRoot Method

When it is called by trusted applications, returns the volume information, root information, or both for the specified path.

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

<SecuritySafeCriticalAttribute> _
Public Shared Function GetDirectoryRoot ( _
	path As String _
) As String


Type: System.String
The path of a file or directory.

Return Value

Type: System.String
A string containing the volume information, root information, or both for the specified path.


The caller does not have the required permission.


path is a zero-length string, contains only white space, or contains one or more invalid characters.


path is Nothing.


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.

Platform Notes

Silverlight for Windows Phone Silverlight for Windows Phone

 This member has a SecurityCriticalAttribute attribute on Silverlight for Windows Phone, because the attribute was present in Silverlight 3. This attribute restricts this member to internal use. Application code that uses this member throws a MethodAccessException.


Supported in: 5, 4, 3

Silverlight for Windows Phone

Supported in: Windows Phone OS 7.1, Windows Phone OS 7.0

XNA Framework

Supported in: Xbox 360, Windows Phone OS 7.0

For a list of the operating systems and browsers that are supported by Silverlight, see Supported Operating Systems and Browsers.

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