如何使用AES对C#中的一些数据进行对称加解密？

using System.Security.Cryptography;

byte[] key = Encoding.UTF8.GetBytes("0123456789abcdef"); // 密钥，长度可以是128位（16字节）、192位（24字节）或256位（32字节）
byte[] iv = Encoding.UTF8.GetBytes("fedcba9876543210"); // 初始化向量，长度固定为128位（16字节）

string plaintext = "要加密的数据";
byte[] encryptedData;

using (Aes aes = Aes.Create())
{
    aes.Key = key;
    aes.IV = iv;

    ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);

    using (MemoryStream memoryStream = new MemoryStream())
    {
        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, encryptor, CryptoStreamMode.Write))
        {
            byte[] plainBytes = Encoding.UTF8.GetBytes(plaintext);
            cryptoStream.Write(plainBytes, 0, plainBytes.Length);
            cryptoStream.FlushFinalBlock();
            encryptedData = memoryStream.ToArray();
        }
    }
}

string encryptedText = Convert.ToBase64String(encryptedData); // 将加密后的数据转换为Base64字符串

byte[] encryptedData = Convert.FromBase64String(encryptedText); // 将Base64字符串转换为字节数组
string decryptedText;

using (Aes aes = Aes.Create())
{
    aes.Key = key;
    aes.IV = iv;

    ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);

    using (MemoryStream memoryStream = new MemoryStream(encryptedData))
    {
        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, decryptor, CryptoStreamMode.Read))
        {
            using (StreamReader streamReader = new StreamReader(cryptoStream))
            {
                decryptedText = streamReader.ReadToEnd();
            }
        }
    }
}

Console.WriteLine(decryptedText); // 输出解密后的数据