title: MsSQL convert string to DateTime
body: <p>Why in MsSQL some milliseconds are rounded to next?
  For example: </p>
  
  <pre><code>SELECT CONVERT(datetime, '2006-04-25 15:50:59.996', 120)
  </code></pre>
  
  <p>Produces</p>
  
  <pre><code>2006-04-25 15:50:59.997
  </code></pre>