title: How to check if IEnumerable is null or empty?
body: <p>I love <code>string.IsNullOrEmpty</code> method. I'd love to have something that would allow the same functionality for IEnumerable. Is there such? Maybe some collection helper class? The reason I am asking is that in <code>if</code> statements the code looks cluttered if the patter is <code>(mylist != null &amp;&amp; mylist.Any())</code>. It would be much cleaner to have <code>Foo.IsAny(myList)</code>. </p>
  
  <p>This post doesn't give that answer: <a href="https://stackoverflow.com/questions/3779817/ienumerable-is-empty">IEnumerable is empty?</a>.</p>