c#怎么实现aes加密

在C#中实现AES加密可以通过使用AesManaged类来实现。下面是一个简单的示例代码：

using System; using System.IO; using System.Security.Cryptography; using System.Text;  public class AesEncryption {     public static string Encrypt(string plainText, string key, string iv)     {         byte[] keyBytes = Encoding.UTF8.GetBytes(key);         byte[] ivBytes = Encoding.UTF8.GetBytes(iv);          byte[] encryptedBytes;          using (AesManaged aes = new AesManaged())         {             aes.Key = keyBytes;             aes.IV = ivBytes;              ICryptoTransform encryptor = aes.CreateEncryptor(aes.Key, aes.IV);              using (MemoryStream ms = new MemoryStream())             {                 using (CryptoStream cs = new CryptoStream(ms, encryptor, CryptoStreamMode.Write))                 {                     using (StreamWriter sw = new StreamWriter(cs))                     {                         sw.Write(plainText);                     }                      encryptedBytes = ms.ToArray();                 }             }         }          return Convert.ToBase64String(encryptedBytes);     }      public static string Decrypt(string encryptedText, string key, string iv)     {         byte[] keyBytes = Encoding.UTF8.GetBytes(key);         byte[] ivBytes = Encoding.UTF8.GetBytes(iv);          byte[] encryptedBytes = Convert.FromBase64String(encryptedText);         string decryptedText;          using (AesManaged aes = new AesManaged())         {             aes.Key = keyBytes;             aes.IV = ivBytes;              ICryptoTransform decryptor = aes.CreateDecryptor(aes.Key, aes.IV);              using (MemoryStream ms = new MemoryStream(encryptedBytes))             {                 using (CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Read))                 {                     using (StreamReader sr = new StreamReader(cs))                     {                         decryptedText = sr.ReadToEnd();                     }                 }             }         }          return decryptedText;     } } 

使用以上代码，你可以通过调用AesEncryption.Encrypt方法进行加密，调用AesEncryption.Decrypt方法进行解密。请注意，你需要提供一个密钥（key）和一个初始化向量（iv），这两个值必须是相同的才能正确解密。