title: How to make a WCF Service to accept both JSON and XML requests?
body: <p>How could make this WCF service endpoint to accept both JSON and XML requests?</p>
  
  <p>As per client, the request to the WCF service endpoint may be either JSON or XML, but the operation to handle that request is the same.</p>
  
  <p>void UpdateTask(string externalTicketId, string externalTaskId, string lastEditedByUser, string taskAction, string taskPrivateNote, string taskResult, string workTimeMinutes);</p>