title: WebConfigurationManager
body: <p>I'm working on C# 2010. My website is unable to run due this error:</p>
  
  <blockquote>
    <p>The name 'WebConfigrationManager' does not exist in the current
    context.</p>
  </blockquote>
  
  <p>Although I've included <code>using System.Web.Configuration;</code>, the line of code the error points to is this:</p>
  
  <pre><code>String connectionString = WebConfigrationManager.ConnectionStrings["costr"].ConnectionString;
  </code></pre>