Is referencing a method/variable in an external namespace more memory efficient than including it entirely?
<p>So is the following equivalent in memory usage?</p>

<pre><code>System.Threading.Thread.Sleep(500);
</code></pre>

<p>vs</p>

<pre><code>using System.Threading;
...
Thread.Sleep(500);
</code></pre>

<p>I would have thought that the less namespaces you're 'using' in memory the better, but I've heard that the former example has to load the namespace into memory regardless. I know <code>Sleep</code> isn't the best example of a memory hungry method but it's just an example. </p>
