aes encrypt file in csharp

main.cs
using System;
using System.IO;
using System.Security.Cryptography;

class AesExample
{
    static void Main()
    {
        string inputFile = @"C:\input.txt";
        string outputFile = @"C:\output.bin";
        string password = "super_secret_password";

        using (Aes aes = Aes.Create())
        {
            // Convert the password to a byte array
            byte[] passwordBytes = System.Text.Encoding.UTF8.GetBytes(password);

            // Derive a key and IV from the password
            // These sizes are the minimum recommended for AES
            Rfc2898DeriveBytes derivedBytes = new Rfc2898DeriveBytes(passwordBytes, saltSize: 8, iterations: 1000);
            byte[] key = derivedBytes.GetBytes(32);
            byte[] iv = derivedBytes.GetBytes(16);

            // Open the input and output files
            using (FileStream inputStream = File.OpenRead(inputFile))
            using (FileStream outputStream = File.Create(outputFile))
            {
                // Write the IV to the beginning of the output file
                outputStream.Write(iv, 0, iv.Length);

                // Create the encryptor and encrypt the input file
                using (ICryptoTransform encryptor = aes.CreateEncryptor(key, iv))
                using (CryptoStream cryptoStream = new CryptoStream(outputStream, encryptor, CryptoStreamMode.Write))
                {
                    inputStream.CopyTo(cryptoStream);
                }
            }
        }
    }
}
1490 chars
41 lines