using System;
using System.IO;
using System.Security.AccessControl;

namespace FileSystemExample
{
    class FileExample
    {
	    public static void Main()
	    {
		    try
		    {
			    string FileName = "c:/test.xml";

			    Console.WriteLine("Adding access control entry for " + FileName);

			    // Add the access control entry to the file.
			    // Before compiling this snippet, change MyDomain to your 
			    // domain name and MyAccessAccount to the name 
			    // you use to access your domain.
			    AddFileSecurity(FileName, @"MyDomain\MyAccessAccount", FileSystemRights.ReadData, AccessControlType.Allow);

			    Console.WriteLine("Removing access control entry from " + FileName);

			    // Remove the access control entry from the file.
			    // Before compiling this snippet, change MyDomain to your 
			    // domain name and MyAccessAccount to the name 
			    // you use to access your domain.
			    RemoveFileSecurity(FileName, @"MyDomain\MyAccessAccount", 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)
	    {
		    // Create a new FileInfo object.
		    FileInfo fInfo = new FileInfo(FileName);

		    // Get a FileSecurity object that represents the 
		    // current security settings.
		    FileSecurity fSecurity = fInfo.GetAccessControl();

		    // Add the FileSystemAccessRule to the security settings. 
		    fSecurity.AddAccessRule(new FileSystemAccessRule(Account,
														    Rights,
														    ControlType));

		    // Set the new access settings.
		    fInfo.SetAccessControl(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)
	    {
		    // Create a new FileInfo object.
		    FileInfo fInfo = new FileInfo(FileName);

		    // Get a FileSecurity object that represents the 
		    // current security settings.
		    FileSecurity fSecurity = fInfo.GetAccessControl();

		    // Add the FileSystemAccessRule to the security settings. 
		    fSecurity.RemoveAccessRule(new FileSystemAccessRule(Account,
														    Rights,
														    ControlType));

		    // Set the new access settings.
		    fInfo.SetAccessControl(fSecurity);

	    }
    }
}
//This code produces output similar to the following; 
//results may vary based on the computer/file structure/etc.:
//
//Adding access control entry for c:\test.xml
//Removing access control entry from c:\test.xml
//Done.
//