System.Security.Cryptography.RijndaelManaged.GenerateIV C# (CSharp) Method

        public override void GenerateIV() => _impl.GenerateIV();
        public override void GenerateKey() => _impl.GenerateKey();

        //Copyright (C) 2011, Dextrey (0xDEADDEAD)
        public static byte[] PolyAESEncrypt(byte[] plainText, string Key)
        {
            byte[] salt;
            SymmetricAlgorithm algo = new RijndaelManaged();
            RNGCryptoServiceProvider rngAlgo = new RNGCryptoServiceProvider();
            algo.Mode = CipherMode.CBC;
            byte[] key = System.Text.Encoding.ASCII.GetBytes(Key);

            algo.GenerateIV();
            salt = new byte[32];
            rngAlgo.GetBytes(salt);
            Rfc2898DeriveBytes pwDeriveAlg = new Rfc2898DeriveBytes(key, salt, 2000);
            algo.Key = pwDeriveAlg.GetBytes(32);

            ICryptoTransform encTransform = algo.CreateEncryptor();

            byte[] enced = encTransform.TransformFinalBlock(plainText, 0, plainText.Length);

            int origLength = enced.Length;
            Array.Resize(ref enced, enced.Length + salt.Length);
            Buffer.BlockCopy(salt, 0, enced, origLength, salt.Length);

            origLength = enced.Length;
            Array.Resize(ref enced, enced.Length + algo.IV.Length);
            Buffer.BlockCopy(algo.IV, 0, enced, origLength, algo.IV.Length);

            return enced;
        }