企业微信接收到回调流数据,但是使用SDK无法解析出解密串消息内容
导致 IWorkRequestMessageBase对象一直为null

实例代码：      
string bodyContent = new StreamReader(stream).ReadToEnd();

           _logger.LogInformation(string.Format("-1.1: {0}", bodyContent));

           var xdoucment = XDocument.Parse(bodyContent);

           _logger.LogInformation(string.Format("-1.2: xdoucment {0}", JsonConvert.SerializeObject(xdoucment)));

           var messageHandler = new WorkCustomMessageHandler(xdoucment, postModel, maxRecordCount, _serviceProvider);
           messageHandler.OmitRepeatedMessage = false;
           messageHandler.SaveRequestMessageLog();

           _logger.LogError("1");

           //var tokenSource = new System.Threading.CancellationTokenSource();

           //await messageHandler.BuildResponseMessageAsync(tokenSource.Token);

           _logger.LogError("2");

           if (string.IsNullOrWhiteSpace(messageHandler.TextResponseMessage))
           {
               _logger.LogError("1111");
           }
           else
           {
               _logger.LogError(messageHandler.TextResponseMessage);
           }

           if (messageHandler.RequestDocument != null)
           {
               _logger.LogInformation("RequestDocument  " + JsonConvert.SerializeObject(messageHandler.RequestDocument));

           }
           else
           {
               _logger.LogError("RequestDocument is null");
           }


           if (messageHandler.RequestMessage == null)
           {
               _logger.LogError("验证不通过或接受信息有错误");
               //验证不通过或接受信息有错误
           }

日志输出：
2022-02-24 18:50:42,861 [11] INFO  Weixin.QY.Demo.Controllers.WorkController [(null)] - -1.1: <xml><ToUserName><![CDATA[dafbecf7153b4674b]]></ToUserName><Encrypt><![CDATA[/IWyXDdX7VS5puIwphNj1ZRC3iMY/HmSK/hKlKO9X6+5YvmfDTh5D0JJHmNzSK/YjknZ51yniaYSkx67hJeWTD43AauD5iPk5zizoqZNLXd9ffloPhfvCCzKwJ7+N0GNITNltGPGs5/8uMrfefuJW9MTE0BT78cL2OT0yqiuY+XjjQmlibGeebS/AIqYOUBRv0d5BDyS1qFYGRR1U71wxj+qbCYldY8C6mVKHVhT6BvMk0ASfxUL0V0oeq/EJQfyE2a59hvFG9guxplTclSqzHTkYShAJ4iJYCjIknIEovf0kQaWm7gLzf1sfYlgHDI5Mi/AS+mTq7Ezdf5cRaA074Pe0f+q5MrOUbVZomMHmETELLKrEvjw4YxWAx+x741jYgme4ZIUUhXZQAzlqFmrjBV7YJF60gAwTFShagMSTAA=]]></Encrypt><AgentID><![CDATA[]]></AgentID></xml>
2022-02-24 18:50:42,904 [11] INFO  Weixin.QY.Demo.Controllers.WorkController [(null)] - -1.2: xdoucment {"xml":{"ToUserName":{"#cdata-section":"dkafbecf7153b4674b"},"Encrypt":{"#cdata-section":"/IWyXDdX7VS5puIwphNj1ZRC3iMY/HmSK/hKlKO9X6+5YvmfDTh5D0JJHmNzSK/YjknZ51yniaYSkx67hJeWTD43AauD5iPk5zizoqZNLXd9ffloPhfvCCzKwJ7+N0GNITNltGPGs5/8uMrfefuJW9MTE0BT78cL2OT0yqiuY+XjjQmlibGeebS/AIqYOUBRv0d5BDyS1qFYGRR1U71wxj+qbCYldY8C6mVKHVhT6BvMk0ASfxUL0V0oeq/EJQfyE2a59hvFG9guxplTclSqzHTkYShAJ4iJYCjIknIEovf0kQaWm7gLzf1sfYlgHDI5Mi/AS+mTq7Ezdf5cRaA074Pe0f+q5MrOUbVZomMHmETELLKrEvjw4YxWAx+x741jYgme4ZIUUhXZQAzlqFmrjBV7YJF60gAwTFShagMSTAA="},"AgentID":{"#cdata-section":""}}}
2022-02-24 18:50:42,932 [11] ERROR Weixin.QY.Demo.Controllers.WorkController [(null)] - 1
2022-02-24 18:50:42,932 [11] ERROR Weixin.QY.Demo.Controllers.WorkController [(null)] - 2
2022-02-24 18:50:42,933 [11] ERROR Weixin.QY.Demo.Controllers.WorkController [(null)] - 1111
2022-02-24 18:50:42,933 [11] ERROR Weixin.QY.Demo.Controllers.WorkController [(null)] - RequestDocument is null
2022-02-24 18:50:42,934 [11] ERROR Weixin.QY.Demo.Controllers.WorkController [(null)] - 验证不通过或接受信息有错误