title: How to avoid "The name 'ConfigurationManager' does not exist in the current context" error?
body: <p>I am using VS2008. I have a project connect with a database and the connection string is read from App.config via ConfigurationManager. We are using L2E.</p>
  
  <p>Now I added a helper project, AndeDataViewer, to have a simple UI to display data from the database for testing/verification purpose.</p>
  
  <p>I don't want to create another set of Entity Data Model in the helper project. I just added all related files as a link in the new helper project. </p>
  
  <p>When I compile, I got the following error:</p>
  
  <pre><code>Error   15  The name 'ConfigurationManager' does not exist in the current context   C:\workspace\SystemSoftware\SystemSoftware\src\systeminfo\RuntimeInfo.cs    24  40  AndeDataViewer
  </code></pre>
  
  <p>I think I may need to add another project setting/config related file's link to the helper project from the main project? There is no App.config file in the new helper project. But it looks I cannot add that file's link to the helper project. Any ideas?</p>