title: Do nothing when "other side" of ternary operator is reached?
body: <p><em>Note: I've seen this question asked sometimes before (<a href="https://stackoverflow.com/questions/30856260/do-nothing-using-ternary-operator">a</a>, <a href="https://stackoverflow.com/questions/20947215/how-to-do-nothing-in-the-else-part-of-ternary-operator">b</a>, <a href="https://stackoverflow.com/questions/20947215/how-to-do-nothing-in-the-else-part-of-ternary-operator">c</a>), but neither of these was in C#, nor helpful.</em></p>
  
  <p>Assume I'm using the <code>? :</code> ternary operator like this (to do nothing when <code>false</code> is the case):</p>
  
  <pre><code>r==5? r=0 : &lt;nothing&gt; ;
  </code></pre>
  
  <p>I'm getting an error. Putting something there will obviously solve the problem.
  How can I still keep the other side empty without making some random empty function?</p>