title: ASP.NET Page says I need to reference an assembly that does not exist!
body: <p>My asp.net site has to run on several client servers.  It's working fine on a majority of them, but a couple have run into an error message on a few pages:</p>
  
  <blockquote>
    <p>Compiler Error Message: CS0012: The type 'MetaNameValuePair' is defined in an assembly that is not referenced. You must add a reference to assembly 'App_Code.t_3vcono, Version=0.0.0.0, Culture=neutral, PublicKeyToken=null'.</p>
  </blockquote>
  
  <p>The type 'MetaNameValuePair' is actually defined in a .cs file within my App_Code folder, not an external assembly.  Is it failing to compile that .cs file?  </p>