title: string.Format() Blank Zero
body: <p>In my application, there are possibilities to format a string using the <code>string.Format()</code> function. I want to add the possibility to return blank when the result is zero.</p>
  <p>As far as I can see, it is possible to do this using the code: <code>0.toString(&quot;0;; &quot;);</code>, but as i already mentioned, I need to use the <code>string.Format()</code> function (since it must be able to use for example the <code>{0:P}</code> format for percentage.</p>
  <p>Does anyone knows how to blank a zero value using the <code>string.Format()</code> function?</p>