C#

Eddy Vluggen wrote:

To my limited knowledge, that would make the file completely "undeletable"?

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.DirectoryServices;
using System.IO;
using System.Security.AccessControl;
using System.Security.Principal;

namespace AppPoolEnum
{
    class Program
    {

        private static void Main(string[] args)
        {
            String filePath = @"D:\Temp\Manfred\Delete-3-Test";
            String accountName = String.Format("Administrators");

            // Create if not existant
            if (!Directory.Exists(filePath))
                Directory.CreateDirectory(filePath);

            setNoDeleteChildren(filePath, accountName);

            String fileOne = String.Format("{0}\\{1}", filePath, "File-One.txt");
            String fileTwo = String.Format("{0}\\{1}", filePath, "File-Two.txt");

            // Create the files
            File.Create(fileOne).Dispose();
            File.Create(fileTwo).Dispose();

            // Check that the two files are there
            if (File.Exists(fileOne) && File.Exists(fileTwo))
                Console.WriteLine("Both files {0} and {1} exist!", fileOne, fileTwo);

            // Set only second file to undeleteable
            setNoDeleteFile(fileTwo, accountName);

            // Try to delete the files
            File.Delete(fileOne);
            File.Delete(fileTwo);

        }

        private static void setNoDeleteFile(String path, String account)
        {
            // current security object
            FileSecurity security = File.GetAccessControl(path);

            // add rule
            security.AddAccessRule(new FileSystemAccessRule(account, FileSystemRights.Delete, AccessControlType.Deny));

            // set access
            File.SetAccessControl(path, security);
        }

        private static void setNoDeleteChildren(String path, String account)
        {
            // current security object
            DirectorySecurity security = Directory.GetAccessControl(path);

            // add rule
            security.AddAccessRule(new FileSystemAccessRule(account, FileSystemRights.DeleteSubdirectoriesAndFiles, AccessControlType.Deny));

            // set access
            Directory.SetAccessControl(path, security);
        }
    }
}

BillWoodruff wrote:

instead of actually deleting the file move the file to a special folder.

Jassim Rahma wrote:

is this possible?

Application attemped to perform an operation not allwoed by the security porlicy. To grant this application the required permission, contact your system administrator or use the Microsoft.NET Framework Configuration tool