C# 在CBC中生成密钥

我是C的新手# 我生成了一个密钥

myRijndaelManaged.GenerateIV（）；
myRijndaelManaged.GenerateKey（）

课堂上

public string EncryptText(string plainText)
    {
        using (myRijndael = new RijndaelManaged())
        {

            RijndaelManaged myRijndaelManaged = new RijndaelManaged();
            myRijndaelManaged.Mode = CipherMode.CBC;
            myRijndaelManaged.Padding = PaddingMode.PKCS7;
            myRijndaelManaged.GenerateIV();
            myRijndaelManaged.GenerateKey();      
            string newKey = ByteArrayToHexString(myRijndaelManaged.Key);
            string newinitVector = ByteArrayToHexString(myRijndaelManaged.IV);
            byte[] encrypted = EncryptStringToBytes(plainText, myRijndael.Key, myRijndael.IV);
            string encString = Convert.ToBase64String(encrypted);
            return encString;
        }
    }

如何在课堂上给出相同的答案

public string DecryptText(string encryptedString)  
    {  
        using (myRijndael = new RijndaelManaged())  
        {  
            myRijndael.Key =newKey;
            myRijndael.IV = newinitVector;  
            myRijndael.Mode = CipherMode.CBC;  
            myRijndael.Padding = PaddingMode.PKCS7;  
            Byte[] ourEnc = Convert.FromBase64String(encryptedString);  
            string ourDec = DecryptStringFromBytes(ourEnc, myRijndael.Key, myRijndael.IV);  
            return ourDec;  
        }  
    }  

当我给另一把钥匙时，我有一个问题
System.Security.Cryptography.CryptographyException:“填充无效，无法删除。”
虽然我不擅长加密，但对我来说还是有意义的。我的意思是，您应该将生成的iv和密钥传递给解密函数。
例如：

public string DecryptText(string encryptedString, string Iv, string Key)  
    {  
        using (myRijndael = new RijndaelManaged())  
        {  
            myRijndael.Key = Key;
            myRijndael.IV = Iv;  
            myRijndael.Mode = CipherMode.CBC;  
            myRijndael.Padding = PaddingMode.PKCS7;  
            Byte[] ourEnc = Convert.FromBase64String(encryptedString);  
            string ourDec = DecryptStringFromBytes(ourEnc, myRijndael.Key, myRijndael.IV);  
            return ourDec;  
        }  
    }  

嗯，我不确定Iv和Key的数据类型是什么，请根据自己的情况进行更改