title: Why am I getting this value?
body: <p>I've got the following:</p>
  
  <pre><code>var deltaTvd = stationTwo.VerticalDepth - stationOne.VerticalDepth;
  </code></pre>
  
  <p>Now, <code>stationTwo.VerticalDepth</code> is 10646.51 and <code>stationOne.VerticalDepth</code> is <code>10580.52</code>. When I subtract these, I get <code>65.99</code>. However, Visual Studio shows the answer as <code>65.989999999999782</code>. The <code>VerticalDepth</code> property is a <code>double</code>. I'm wondering why I get the extra decimal places instead of just the <code>65.99</code>?</p>