title: Compare two DateTimeOffset objects
body: <p>I want to have the difference of two <a href="http://msdn.microsoft.com/en-us/library/system.datetimeoffset.aspx" rel="noreferrer">DateTimeOffset</a> object in days( for example check if the difference is less than 40 days).</p>
  
  <p>I know it can be done by change it to FileTime, but wondering if there is any better way of doing it.</p>