title: Read connection string from web.config
body: <p>How can I read a connection string from a <code>web.config</code> file into a public class contained within a class library?</p>
  
  <p>I've tried:</p>
  
  <pre><code>WebConfigurationManager
  
  ConfigurationManager
  </code></pre>
  
  <p>But these classes are not recognized within my class library.</p>