title: Fitnesse - Getting the absolute path for a fitnesse url
body: <p>I am busy learning fitnesse at the moment and have not been able to figure out how to work out how to get an absolute path from a relative url.
  I want to be able to upload test files to the files directory on a fitnesse server and then read those files in my test fixture.
  e.g.</p>
  
  <pre><code>public void ReadTextFileContent(string fileName)
  {
     Text = File.ReadAllText(fileName);
  }
  </code></pre>
  
  <p>Note: The fileName would be the fully qualified path to the file.  I want to be able to define this path in terms of the relative path to the fitnesse server so that in a multi user setup, users will not need to have their fitnesse server running on the same drive or path.</p>