title: How to code characters in Web.Config by Unicode value
body: <p>In ASP.net, using a WEB.CONFIG file with an appSettings section;  I am trying to store some string variables.  One is a string containing a non breaking space (unicode hex value 00A0), and the other is an empty string.  </p>
  
  <p>I am thinking it is something like "#&amp;FFFF" for unicode, but can't find any guidance on this.  Also, the WEB.CONFIG file does not like an empty string.</p>
  
  <p>I have a workaround for this, but it would be great to know how to store unicode characters or empty strings in the config file.</p>