RijndaelManaged解密问题

using System.Security.Cryptography;
using System.Text;

RijndaelManaged rijndael = new RijndaelManaged();

byte[] key = Encoding.UTF8.GetBytes("密钥");
byte[] iv = Encoding.UTF8.GetBytes("初始化向量");
rijndael.Key = key;
rijndael.IV = iv;

ICryptoTransform decryptor = rijndael.CreateDecryptor();

byte[] encryptedData = Convert.FromBase64String("待解密的数据");

using (MemoryStream ms = new MemoryStream())
{
    using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Write))
    {
        cs.Write(encryptedData, 0, encryptedData.Length);
        cs.FlushFinalBlock();
        byte[] decryptedData = ms.ToArray();
        // 解密后的数据存储在decryptedData中
    }
}