format number in C#
<blockquote>
  <p><strong>Possible Duplicate:</strong><br>
  <a href="http://stackoverflow.com/questions/105770/net-string-format-to-add-commas-in-thousands-place-for-a-number">.NET String.Format() to add commas in thousands place for a number</a>  </p>
</blockquote>



<p>How to format a number 1234567 into  1,234,567   in C#?</p>
