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FileIOPermission Constructor (FileIOPermissionAccess, String)

Initializes a new instance of the FileIOPermission class with the specified access to the designated file or directory.

Namespace:  System.Security.Permissions
Assembly:  mscorlib (in mscorlib.dll)

public FileIOPermission(
	FileIOPermissionAccess access,
	string path


Type: System.Security.Permissions.FileIOPermissionAccess

A bitwise combination of the FileIOPermissionAccess enumeration values.

Type: System.String

The absolute path of the file or directory.


The access parameter is not a valid value of FileIOPermissionAccess.


The path parameter is not a valid string.


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

This constructor allows only one of the FileIOPermissionAccess values to be specified for the specified file or directory. Use the AddPathList method to define complex permissions.

The following code example shows the use of the FileIOPermission.FileIOPermission(FileIOPermissionAccess, String) constructor to create a new instance of the FileIOPermission class, which provides complete access to the C:\test_r file.

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: 4.5.2, 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 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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