title: Poltergeist antipattern example
body: <p>I'm trying to understand what is Poltergeist antipattern, and how does it differ from Command or Delegate patterns.
  I've read:</p>
  
  <p><a href="http://en.wikipedia.org/wiki/Poltergeist_(computer_science)" rel="noreferrer">http://en.wikipedia.org/wiki/Poltergeist_(computer_science)</a>
  <a href="http://sourcemaking.com/antipatterns/poltergeists" rel="noreferrer">http://sourcemaking.com/antipatterns/poltergeists</a></p>
  
  <p>But didn't understand the difference...</p>
  
  <p>So to make it clear I would like to see the code example of it (I prefer C# or Java languages). </p>
  
  <p>Does anybody have it?</p>