title: System.FormatException when trying to convert String to Double
body: <p>I got this error when I'm trying to convert String into Double on WP7 C#. </p>
  
  <pre><code>tokenvalue = Convert.ToDouble(saParsed[i].Replace(".", ","));
  </code></pre>
  
  <p>I getting this error in WP7.
  A first chance exception of type <code>System.FormatException</code> occurred in <code>mscorlib.dll</code></p>
  
  <p>Is there any way to avoid it or is it only a fault of Emulator?</p>