Add 12 hours to time.now in c#
<p>I am adding 12 hours to the current time. but the current time is displayed in the text box, what is wrong with the code</p>

<pre><code> DateTime expiresAt = System.DateTime.Now.AddHours(12);
 txt_ExpiresBy.Text = expiresAt.ToString(@"dd/MM/yyyy hh:mm:ss");
</code></pre>
