title: How ConcurrentDictionary is accessed and how to serialize it?
body: <p>I've never used the ConcurrentDictionary object before and have a couple questions about it:</p>
  
  <ol>
  <li><p>Am I correct that multiple threads can read from the dictionary at the same time, but if it's being written to, no other thread can access it?</p></li>
  <li><p>Can this object be serialized to disk?</p></li>
  </ol>
  
  <p>Thanks.</p>