kms Crypto AESEncrypter Partial 2

AESEncrypter.cs

using (Aes aes = Aes.Create())
{
    ICryptoTransform cryptoTransform = aes.CreateEncryptor(plainTextKey, _iv);
    
    using (MemoryStream memoryStream = new MemoryStream())
    {    
        using (CryptoStream cryptoStream = new CryptoStream(memoryStream, cryptoTransform, CryptoStreamMode.Write))
        {
            using (StreamWriter streamWriter = new StreamWriter(cryptoStream))
            {
                await streamWriter.WriteAsync(plainText);
            }

            encryptedData = memoryStream.ToArray();
        }
    }
}