What is good practice when u create a method whose parameter contains 2 objects but it only changes 1
<p>for example:</p>

<pre><code>          void FilterA(Hashset&lt;T&gt; blackList, List&lt;T&gt; myList)
          {
            blackList.UnionWith(myList);
          }
</code></pre>

<p>I don't know if there would be some good coding styles that separates <code>blackList</code> and <code>myList</code> apart. Or is it necessary at all?</p>
