title: Can't solve Could not load type 'System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider'
body: <p>I have a web ASP.NET site that it working fine with WCF services. Now, I have a class Library for Telerik Reports that also needs to call these same web services. I keep getting the error Could not load type 'System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider'. when I try to add a Service Reference to the web service. I have searched the topic and done everything people pointed out. In the project that implement the web services and the site, the config has:</p>
  
  <pre><code>compilation debug="true" targetFramework="4.5"&gt;
          &lt;assemblies&gt;
            &lt;add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /&gt;
            &lt;add assembly="System.Windows.Forms, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
            &lt;add assembly="System.Speech, Version=4.0.0.0, Culture=neutral, PublicKeyToken=31BF3856AD364E35" /&gt;
            &lt;add assembly="System.Data.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
  
            &lt;add assembly="Telerik.ReportViewer.WebForms, Version=8.0.14.225, Culture=neutral, PublicKeyToken=a9d7983dfcc261be" /&gt;
            &lt;add assembly="Telerik.Reporting, Version=8.0.14.225, Culture=neutral, PublicKeyToken=a9d7983dfcc261be" /&gt;
          &lt;/assemblies&gt;
          &lt;buildProviders&gt;
            &lt;add extension=".edmx" type="System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider" /&gt;
          &lt;/buildProviders&gt;
  </code></pre>
  
  <p>And in the class library config:</p>
  
  <pre><code>&lt;compilation debug="true" targetFramework="4.5"&gt;
      &lt;assemblies&gt;
        &lt;add assembly="System.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B03F5F7F11D50A3A" /&gt;
        &lt;add assembly="System.Data.Entity, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
        &lt;add assembly="System.Data.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
      &lt;/assemblies&gt;
      &lt;buildProviders&gt;
        &lt;add extension=".edmx" type="System.Data.Entity.Design.AspNet.EntityDesignerBuildProvider" /&gt;
      &lt;/buildProviders&gt;
  </code></pre>
  
  <p>All of the answers I've read say to add the following but it still does not work:</p>
  
  <pre><code>&lt;add assembly="System.Data.Entity.Design, Version=4.0.0.0, Culture=neutral, PublicKeyToken=B77A5C561934E089" /&gt;
  </code></pre>