title: ASP.NET Web Api: Project requires SQL Server Express
body: <p>I created a Web API project under VS 2010.
  After I switched to VS 2012, I always get a warning:</p>
  
  <blockquote>
    <p>The Web project 'xxx' requires SQL Server Express, whcih is not
    installed on this computer. [...]</p>
  </blockquote>
  
  <p>I do not want to install this SQL Server Express. I use IIS for debugging.
  How can I disable this dependency?</p>
  
  <p>I noticed also this in my web.config:</p>
  
  <pre><code>&lt;connectionStrings&gt;
      &lt;add name="DefaultConnection" connectionString="Data Source=.\SQLEXPRESS;AttachDbFilename=|DataDirectory|[...].mdf;Initial Catalog=[...];Integrated Security=True;User Instance=True" providerName="System.Data.SqlClient" /&gt;
    &lt;/connectionStrings&gt;
  </code></pre>
  
  <p>Who created this? Can I delete this?</p>