title: Double string.format
body: <p>I have some double values I want to convert to a string with this pattern:</p>
  
  <pre><code>0.xx or x.xx
  </code></pre>
  
  <p>Currently I have try this:</p>
  
  <pre><code>double.ToString("#.#0");
  </code></pre>
  
  <p>What should I add in order to see zero in case my number start with zero?</p>