title: Add decimal hours to timespan
body: <p>I have a <code>Decimal</code> value representing fractional number of hours in a time interval.</p>
  
  <p>Now I need to sum this value to a <code>TimeSpan</code>, but I cannot find an effective method to do it.</p>
  
  <p>My solution, for now, is to do something like this:</p>
  
  <pre><code>myTimeSpan + new TimeSpan(0, 0, Math.Abs(decimalHours * 3600))
  </code></pre>
  
  <p>Is there any better way to solve my issue?</p>