title: Unable to Extract MTOM/XOP Attachment in C#
body: <p>I'm still unable to extract the MIME attachment. Please check below MIME message. which we received from the service.</p>
  
  <pre><code>--MIMEBoundary_199ca6b7114b9acca5deb2047d25d5841d4afb7f68281379
  Content-Type: application/xop+xml; charset=utf-8; type="text/xml"
  Content-Transfer-Encoding: binary
  Content-ID: &lt;0.099ca6b7114b9acca5deb2047d25d5841d4afb7f68281379@apache.org&gt;
  
  &lt;?xml version="1.0" encoding="utf-8"?&gt;&lt;soapenv:Envelope xmlns:soapenv="http://schemas.xmlsoap.org/soap/envelope/"&gt;&lt;soapenv:Header&gt;&lt;StateHeader xmlns="http://www.statemef.com/StateGatewayService"&gt;&lt;MessageID&gt;12345201704200009962&lt;/MessageID&gt;&lt;RelatesTo&gt;12345201704200009962&lt;/RelatesTo&gt;&lt;Action&gt;GetNewAcks&lt;/Action&gt;&lt;Timestamp&gt;2017-02-11T01:54:51.676-05:00&lt;/Timestamp&gt;&lt;TestIndicator&gt;T&lt;/TestIndicator&gt;&lt;/StateHeader&gt;&lt;/soapenv:Header&gt;&lt;soapenv:Body&gt;&lt;GetNewAcksResponse xmlns="http://www.statemef.com/StateGatewayService"&gt;&lt;MoreAvailable&gt;true&lt;/MoreAvailable&gt;&lt;AcknowledgementListAttachmentMTOM&gt;&lt;xop:Include xmlns:xop="http://www.w3.org/2004/08/xop/include" href="cid:299ca6b7114b9acca5deb2047d25d5841d4afb7f68281379@apache.org"&gt;&lt;/xop:Include&gt;&lt;/AcknowledgementListAttachmentMTOM&gt;&lt;/GetNewAcksResponse&gt;&lt;/soapenv:Body&gt;&lt;/soapenv:Envelope&gt;
  --MIMEBoundary_199ca6b7114b9acca5deb2047d25d5841d4afb7f68281379
  Content-Type: application/octet-stream
  Content-Transfer-Encoding: binary
  Content-ID: &lt;299ca6b7114b9acca5deb2047d25d5841d4afb7f68281379@apache.org&gt;
  </code></pre>