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FileIOPermission.AddPathList Method (FileIOPermissionAccess, String)

Adds access for the specified file or directory to the existing state of the permission.

Namespace:  System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)
public void AddPathList(
	FileIOPermissionAccess access,
	string path


Type: System.Security.Permissions.FileIOPermissionAccess

A bitwise combination of the FileIOPermissionAccess values.

Type: System.String

The absolute path of a file or directory.


The access parameter is not a valid value of FileIOPermissionAccess.


The path parameter is not a valid string.


The path parameter did not specify the absolute path to the file or directory.


The path parameter is null.


The path parameter has an invalid format.

Use this method to modify file and directory access by adding to the state of the current permission.

The following code example shows the use of the FileIOPermission.AddPathList(FileIOPermissionAccess, String) method.

FileIOPermission f2 = new FileIOPermission(FileIOPermissionAccess.Read, "C:\\test_r");
f2.AddPathList(FileIOPermissionAccess.Write | FileIOPermissionAccess.Read, "C:\\example\\out.txt");
catch (SecurityException s)

.NET Framework

Supported in: 4.5.1, 4.5, 4, 3.5, 3.0, 2.0, 1.1, 1.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1

Windows Phone 8.1, Windows Phone 8, Windows 8.1, Windows Server 2012 R2, Windows 8, Windows Server 2012, Windows 7, Windows Vista SP2, Windows Server 2008 (Server Core Role not supported), Windows Server 2008 R2 (Server Core Role supported with SP1 or later; Itanium not supported)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.

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