如何在没有IV的情况下在.NET中进行AES加密

using System.Security.Cryptography;

AesManaged aesManaged = new AesManaged();

aesManaged.KeySize = 128;
aesManaged.BlockSize = 128;
aesManaged.Mode = CipherMode.CBC;
aesManaged.Padding = PaddingMode.None;

aesManaged.GenerateKey();

string plainText = "Hello, World!";
byte[] plainTextBytes = Encoding.UTF8.GetBytes(plainText);
byte[] cipherTextBytes = aesManaged.CreateEncryptor().TransformFinalBlock(plainTextBytes, 0, plainTextBytes.Length);
string cipherText = Convert.ToBase64String(cipherTextBytes);

string cipherText = "SGVsbG8sIHdvcmxkIQ==";
byte[] cipherTextBytes = Convert.FromBase64String(cipherText).Reverse().ToArray();
byte[] decryptedTextBytes = aesManaged.CreateDecryptor().TransformFinalBlock(cipherTextBytes, 0, cipherTextBytes.Length);
string decryptedText = Encoding.UTF8.GetString(decryptedTextBytes);

string decryptedText = "Hello, World!";
byte[] decryptedTextBytes = Encoding.UTF8.GetBytes(decryptedText);
byte[] cipherTextBytes = aesManaged.CreateDecryptor().TransformFinalBlock(decryptedTextBytes, 0, decryptedTextBytes.Length);
string cipherText = Convert.ToBase64String(cipherTextBytes);

byte[] iv = aesManaged.IV;
byte[] cipherTextBytesWithoutIV = cipherTextBytes.Skip(iv.Length).ToArray();
string cipherTextWithoutIV = Convert.ToBase64String(cipherTextBytesWithoutIV);

string decryptedText = "Hello, World!";
byte[] decryptedTextBytes = Encoding.UTF8.GetBytes(decryptedText);
byte[] cipherTextBytesWithoutIV = aesManaged.CreateDecryptor().TransformFinalBlock(decryptedTextBytes, 0, decryptedTextBytes.Length);
byte[] iv = cipherTextBytesWithoutIV.Take(aesManaged.IV.Length).ToArray();
byte[] cipherTextBytesWithIV = cipherTextBytesWithoutIV.Skip(iv.Length).ToArray();
string cipherTextWithIV = Convert.ToBase64String(cipherTextBytesWithIV);