What does a single | or & mean?
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/35301/what-is-the-diffference-between-the-and-or-operators">What is the diffference between the | and || or operators?</a><br>
  <a href="http://stackoverflow.com/questions/5705262/what-does-pipe-mean-in-c">What does | (pipe) mean in c#?</a>  </p>
</blockquote>



<p>I have some code that was written by another developer in the office, who isn't in at the moment. I have some work to do on his code, but I have not coma across this before. I tried searching on here, but it strips my | out of the search line. I also don't know what the name for that symbol is, so couldn't search for it like that.</p>

<pre><code>this.Action.Values[key] = (int)this.Action.Values[key] | 1;
</code></pre>

<p>My question is what does the single or do in this instance?</p>
