title: Getting error "The name 'Configuration' does not exist in the current context"
body: <p>I am using Visual Studio 2013 with .NET Framework 4.5.</p>
  
  <p>I have included the <code>System.Configuration</code> as a reference in the project.</p>
  
  <p>I have also included a using statement in the class as such:</p>
  
  <pre><code>using System.Configuration;
  </code></pre>
  
  <p>However, the following line still gives me the above subject error. How do I get rid of the error?</p>
  
  <pre><code>using (SqlConnection conn = new SqlConnection(ConfigurationManager.ConnectionStrings["WarrantySqlConnection"].ToString()))
  </code></pre>
  
  <p>The compile time error is on the <code>ConfigurationManager</code> word.</p>