Чтобы добавить или удалить элемент acl из каталога

using System;

using System.IO;

using System.Security.AccessControl;

namespace FileSystemExample

{

class FileExample

{

public static void Main()

{

try

{

string fileName = "test.xml";

Console.WriteLine("Adding access control entry for "

+ fileName);

// Add the access control entry to the file.

AddFileSecurity(fileName, @"DomainName\AccountName",

FileSystemRights.ReadData, AccessControlType.Allow);

Console.WriteLine("Removing access control entry from "

+ fileName);

// Remove the access control entry from the file.

RemoveFileSecurity(fileName, @"DomainName\AccountName",

FileSystemRights.ReadData, AccessControlType.Allow);

Console.WriteLine("Done.");

}

catch (Exception e)

{

Console.WriteLine(e);

}

}

// Adds an ACL entry on the specified file for the specified account.

public static void AddFileSecurity(string fileName, string account,

FileSystemRights rights, AccessControlType controlType)

{

// Get a FileSecurity object that represents the

// current security settings.

FileSecurity fSecurity = File.GetAccessControl(fileName);

// Add the FileSystemAccessRule to the security settings.

fSecurity.AddAccessRule(new FileSystemAccessRule(account,

rights, controlType));

// Set the new access settings.

File.SetAccessControl(fileName, fSecurity);

}

// Removes an ACL entry on the specified file for the specified account.

public static void RemoveFileSecurity(string fileName, string account,

FileSystemRights rights, AccessControlType controlType)

{

// Get a FileSecurity object that represents the

// current security settings.

FileSecurity fSecurity = File.GetAccessControl(fileName);

// Add the FileSystemAccessRule to the security settings.

fSecurity.RemoveAccessRule(new FileSystemAccessRule(account,

rights, controlType));

// Set the new access settings.

File.SetAccessControl(fileName, fSecurity);

}

}

}