سورس پاک کردن فایل بصورتی که ریکاوری نشه

کد:
[DllImport("kernel32.dll", SetLastError = true, CharSet = CharSet.Unicode)]

        private static extern bool MoveFileEx(string lpExistingFileName, string lpNewFileName,

                                              uint dwFlags);



        private static int Main(string[] args)

        {

            if (args.Length != 1) return 1;

            if (!File.Exists(args[0])) return 1;



            string renamed = Path.GetDirectoryName(args[0]) + "\\" + "temp";



            Random R = new Random();



            MoveFileEx(args[0], renamed, 0x00000008);

            FileStream fs = new FileStream(renamed, FileMode.Open, FileAccess.Write, FileShare.Write);



            byte[] zero = new byte[1024];

            byte[] random = new byte[1024];

            R.NextBytes(random);



            Console.WriteLine("Starting...");



            //Random pass

            for (int i = 0; i < fs.Length; i += random.Length)

            {

                fs.Seek(i, SeekOrigin.Begin);

                fs.Write(random, 0, random.Length);

                R.NextBytes(random);

            }

            fs.Seek(0, SeekOrigin.Begin);

            fs.Flush();



            //Zero pass

            for (int i = 0; i < fs.Length; i += zero.Length)

            {

                fs.Seek(i, SeekOrigin.Begin);

                fs.Write(zero, 0, zero.Length);

            }



            fs.Flush();

            fs.Close();

            fs.Dispose();



            Array.Clear(random, 0, random.Length);

            Array.Clear(zero, 0, zero.Length);



            Console.WriteLine("Deleting...");

            Thread.Sleep(1000);



            File.Delete(renamed);



            Console.WriteLine("Finished...");



            return 0;

        }