title: Check if Dates Intersect?
body: <p>I have two Classes which are made up of two DateTime values. A start Date and an End Date.</p>
  
  <p>Basically, I need a way of checking if one of the classes Start Date - End Date range intersects with the other Classes'.</p>
  
  <p>Is there an easy way to do this?</p>
  
  <p>Cheers.</p>