在c#中加密文件最简单的方法是什么？

using System.IO;

// 加密文件
string inputFile = @"C:\example.txt";
string outputFile = @"C:\encrypted.txt";

using (FileStream fs = new FileStream(inputFile, FileMode.Open))
{
    using (FileStream fsEncrypted = new FileStream(outputFile, FileMode.Create))
    {
        using (Aes aes = Aes.Create())
        {
            aes.Key = Encoding.UTF8.GetBytes("1234567890123456");
            aes.IV = Encoding.UTF8.GetBytes("1234567890123456");

            using (CryptoStream cs = new CryptoStream(fsEncrypted, aes.CreateEncryptor(), CryptoStreamMode.Write))
            {
                fs.CopyTo(cs);
            }
        }
    }
}