DES oracle如何解密c#中的等价物

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

DESCryptoServiceProvider des = new DESCryptoServiceProvider();

des.Key = Encoding.ASCII.GetBytes("密钥");
des.IV = Encoding.ASCII.GetBytes("初始化向量");

ICryptoTransform decryptor = des.CreateDecryptor();

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

MemoryStream ms = new MemoryStream();

CryptoStream cs = new CryptoStream(ms, decryptor, CryptoStreamMode.Write);

cs.Write(encryptedData, 0, encryptedData.Length);
cs.FlushFinalBlock();

byte[] decryptedData = ms.ToArray();

cs.Close();
ms.Close();

string decryptedText = Encoding.UTF8.GetString(decryptedData);