title: Namespace error OfficeOpenXML EPPlus
body: <p>I'm having difficulty setting up EPPlus in Visual Studio 2012.</p>
  
  <pre><code>using OfficeOpenXML;
  The type or namespace name 'OfficeOpenXML' could not be found(are you missing a using directive or an assembly reference?)
  </code></pre>
  
  <p>Now I tried 2 different ways to set EPPlus up.</p>
  
  <p>I manually added a Project->Add Reference to the Epplus.dll file in my documents.</p>
  
  <p>I also tried to use NuGet package manager console: PM> Install-Package EPPlus</p>
  
  <p>I clearly see EPPlus is added to the References in my project, but the namespace for OfficeOpenXML is not added. How do I add this namespace with the EPPlus reference?</p>