title: How to use string interpolation in a resource file?
body: <p>I would like to use a resource file to send an email. In my resource file I used a variable "EmailConfirmation" with the value "Hello {userName} ... "</p>
  
  <p>In my class I used:</p>
  
  <pre><code>public static string message (string userName)
  {
     return Resource.WebResource.EmailConfirmation
  }
  </code></pre>
  
  <p>The problem is that the return says "Hello {userName}" instead of "Hello Toto".</p>