title: HttpContext.Current always equal to null
body: <p>Please help me to fix my problem.
   My problem is the HTTPContext.Current is always equal to null.
   Thanks in advance.. Please see below code   </p>
  
  <pre><code>HttpContext _context = null;
  public EventReceiver()
  {
      _context = HttpContext.Current;
  }
  </code></pre>