RijndaelManaged AES = ConfigureEncryption(password, salt);
    using (FileStream nowyPlik = new FileStream(inputFileName + ".aes", FileMode.Create))
    {
        nowyPlik.Write(salt, 0, salt.Length);
        using (CryptoStream szyfrowanie = new CryptoStream(nowyPlik, AES.CreateEncryptor(),
        CryptoStreamMode.Write))
        {
            using (FileStream plikDoZaszyfrowania = new FileStream(inputFileName, FileMode.Open))
            {
                byte[] buffer = new byte[1048576];
                int read;
                while ((read = plikDoZaszyfrowania.Read(buffer, 0, buffer.Length)) > 0)
                {
                    szyfrowanie.Write(buffer, 0, read);
                }
            }
        }
    }
}