title: Can't convert time to ISO 8601 using C#
body: <p>Consider this code:</p>
  
  <pre><code>TimeStamp.Text = BlogComment.Date.UtcNow.ToString("yyyy-MM-ddTHH\:mm\:ss.fffffffzzz");
  </code></pre>
  
  <p><code>BlogComment.Date</code> is a <code>DateTime</code> object with its date set. <code>TimeStamp</code> is just a literal.</p>
  
  <p>I keep getting unrecognised escape sequence. How can I fix this problem?</p>