title: Convert double to string, keep format - C#
body: <p><em>Hi all. I have a double number (Ex: 0.000006). I want convert it to string type. But result is "6E-06". I dont want it, i want 0.000006".Thanks you so much</em></p>
  
  <pre><code>double a = 0.000006; 
  string resultString = a.toString();
  </code></pre>
  
  <p>I don't know many number after "." character</p>