以下是一個使用C#實作AES加密和解密JSON數據的例子：
```csharpusing System;using System.Security.Cryptography;using System.Text;using System.Web.Script.Serialization;namespaceAesEncryptionExample{publicstatic classAesEncryption {publicstaticstringEncryptJson(object data, byte[] key, byte[] iv) {// 將物件轉換為JSON字串 JavaScriptSerializer serializer = new JavaScriptSerializer();string json = serializer.Serialize(data);using (Aes aesAlg = Aes.Create()) { aesAlg.Key = key; aesAlg.IV = iv; ICryptoTransform encryptor = aesAlg.CreateEncryptor(aesAlg.Key, aesAlg.IV);byte[] encryptedData;using (MemoryStream msEncrypt = new MemoryStream()) {using (CryptoStream csEncrypt = new CryptoStream(msEncrypt, encryptor, CryptoStreamMode.Write)) {using (StreamWriter swEncrypt = new StreamWriter(csEncrypt)) { swEncrypt.Write(json); } encryptedData = msEncrypt.ToArray(); } }// 將加密後的數據轉換為Base64字串string encryptedJson = Convert.ToBase64String(encryptedData);return encryptedJson; } }publicstatic T DecryptJson<T>(string encryptedJson, byte[] key, byte[] iv) {byte[] encryptedData = Convert.FromBase64String(encryptedJson);using (Aes aesAlg = Aes.Create()) { aesAlg.Key = key; aesAlg.IV = iv; ICryptoTransform decryptor = aesAlg.CreateDecryptor(aesAlg.Key, aesAlg.IV);string decryptedJson;using (MemoryStream msDecrypt = new MemoryStream(encryptedData)) {using (CryptoStream csDecrypt = new CryptoStream(msDecrypt, decryptor, CryptoStreamMode.Read)) {using (StreamReader srDecrypt = new StreamReader(csDecrypt)) { decryptedJson = srDecrypt.ReadToEnd(); } } }// 將解密後的JSON字串轉換為物件 JavaScriptSerializer serializer = new JavaScriptSerializer(); T decryptedData = serializer.Deserialize<T>(decryptedJson);return decryptedData; } } }public classPerson {publicstring Name { get; set; }publicint Age { get; set; } }public classProgram {publicstaticvoidMain(string[] args) {byte[] key = Encoding.UTF8.GetBytes("ThisIsASecretKey");byte[] iv = Encoding.UTF8.GetBytes("ThisIsAnIV123456"); Person person = new Person { Name = "Alice", Age = 25 };string encryptedJson = AesEncryption.EncryptJson(person, key, iv); Console.WriteLine("加密後的數據: " + encryptedJson); Person decryptedPerson = AesEncryption.DecryptJson<Person>(encryptedJson, key, iv); Console.WriteLine("解密後的數據: " + decryptedPerson.Name + ", " + decryptedPerson.Age); } }}```
在上面的例子中，我們定義了一個`AesEncryption`類，其中包含`EncryptJson`和`DecryptJson`方法，分別用於加密和解密JSON數據。在加密過程中，我們使用Aes演算法和指定的金鑰和IV來加密JSON字串。在解密過程中，我們使用相同的金鑰和IV來解密加密的數據，並將解密後的JSON字串轉換為物件。
這只是一個簡單的範例，實際使用時應註意金鑰和IV的安全儲存和管理，以及處理加密和解密操作的錯誤和異常情況。
