Convert difference in milliseconds to .MaxValue back to Date/Time
<p>For a rowkey on Azure <code>TableStorage</code> entities following prefix is used:</p>

<pre><code>DateTime.MaxValue.Subtract(DateTime.UtcNow).TotalMilliseconds
</code></pre>

<p>As far as I know should this <code>timestamp</code> act as a kind of "sorter" so that newer entities are on top of an list. So, this shown code line creates (as I can imagine) the amount of milliseconds of the current date/time till the <code>DateTime.MaxValue</code>.</p>

<p>Is there a simple and safe way, to convert this amount of milliseconds "back" to the date/time when the <code>timestamp</code> was created? I´m not so familiar with date/time conversions...</p>