title: Datetime usage with in <> operators
body: <p>I have a datetime definition that I do not know how to use of. What exactly is the expression between the &lt;> signs? it returns Boolean but how?</p>
  
  <pre><code>bool x= DateTime.Now.AddDays(20) &lt;DateTime.Now &amp;&amp; DateTime.Now.AddDays(10)&gt; DateTime.Now;
  </code></pre>