title: What happens in WCF if there are additional request that the limit set in MaxConcurrentCalls?
body: <p>I am trying to throttle maximum concurrent calls to my WCF service. I am limiting them as follows:</p>
  
  <pre><code>&lt;behaviors&gt;
        &lt;serviceBehaviors&gt;
          &lt;behavior  name="Throttled"&gt;
            &lt;serviceThrottling
              maxConcurrentCalls="4"
            /&gt;
          &lt;/behavior&gt;
        &lt;/serviceBehaviors&gt;
  &lt;/behaviors&gt;
  </code></pre>
  
  <p>My question is as follows:</p>
  
  <ol>
  <li><p>What happens if there are extra request than that set in "maxConcurrentCalls"? Will they be queued up or rejected?</p></li>
  <li><p>Will the user gets any error/exception as maxconcurrent call is reached?</p></li>
  <li><p>I want additional request to be queued and the user should not get any error or exception. What should be done for that?</p></li>
  </ol>