What does `{0:X2}` mean in this code sample?
<p>In the below code sample, what does <code>{0:X2}</code> mean? This is from the reflection section of the MCTS Application Development Foundation book (covering dynamic code, etc.).</p>

<pre><code>foreach(Byte b in body.GetILAsBodyArray())
{
Console.Write("{0:X2}", b);
}
</code></pre>
