title: Why does visual studio give me Type is not defined for my App_Code classes?
body: <p>"Type 'HR.Database' is not defined'</p>
  
  <p>I get that error for several classes that are stored in the App_Code folder in the Error List panel when building my project.</p>
  
  <p>It is a class I wrote with namespace HR</p>
  
  <p>How can I reference it or alter the project to recognize those classes and remove the error?</p>
  
  <p>I thought I should reference it but when trying to add a reference there are no items in the list of projects. Also, they are .vb files and not a .dll</p>