title: Invoking asynchronous call in a C# web service
body: <p>I'm consuming a third-party resource (a .dll) in a web service, and my problem is, that invoking this resource (calling a method) is done asynchronous - I need to subscribe to an event, to get the answer for my request. How do I do that in a c# web service?</p>
  
  <p><strong>Update:</strong></p>
  
  <p>With regard to <a href="https://stackoverflow.com/questions/246791/invoking-asynchronous-call-in-a-c-web-service/246892#246892">Sunny's answer</a>:</p>
  
  <p>I don't want to make my web service asynchronous.</p>