title: How to effectively log asynchronously?
body: <p>I am using Enterprise Library 4 on one of my projects for logging (and other purposes).  I've noticed that there is some cost to the logging that I am doing that I can mitigate by doing the logging on a separate thread.</p>
  
  <p>The way I am doing this now is that I create a LogEntry object and then I call BeginInvoke on a delegate that calls Logger.Write.</p>
  
  <pre><code>new Action&lt;LogEntry&gt;(Logger.Write).BeginInvoke(le, null, null);
  </code></pre>
  
  <p>What I'd really like to do is add the log message to a queue and then have a single thread pulling LogEntry instances off the queue and performing the log operation.  The benefit of this would be that logging is not interfering with the executing operation and not every logging operation results in a job getting thrown on the thread pool.</p>
  
  <p>How can I create a shared queue that supports many writers and one reader in a thread safe way?  Some examples of a queue implementation that is designed to support many writers (without causing synchronization/blocking) and a single reader would be really appreciated.</p>
  
  <p>Recommendation regarding alternative approaches would also be appreciated, I am not interested in changing logging frameworks though.</p>