title: Does lambda event subscription create memory leak?
body: <p>Does this code create a memory leak?</p>
  
  <pre><code>WebClient client = new WebClient();
  
  client.DownloadDataCompleted += (sen, args) =&gt; {
  
  };
  client.DownloadData("http://foo.bar");
  </code></pre>
  
  <p>As there is no way to actually unsubscribe from the event. Can I say we must never use lambda for event subscription?</p>