title: .NET RIA Services - DataService problem
body: <p>I downloaded an example of the application based on the .NET RIA services from the article:
  <a href="http://blogs.msdn.com/brada/archive/2009/07/22/business-apps-example-for-silverlight-3-rtm-and-net-ria-services-july-update-part-6-poco-and-authentication-provider.aspx" rel="nofollow noreferrer">http://blogs.msdn.com/brada/archive/2009/07/22/business-apps-example-for-silverlight-3-rtm-and-net-ria-services-july-update-part-6-poco-and-authentication-provider.aspx</a>
  from the "download the full demo files" link.</p>
  
  <p>On my PC (MS VS 2008, SP1, NET RIA Services for vs2008) it is not compilable. I have the following error on attempt to compile application:</p>
  
  <p>Error   2   The type or namespace name 'DataService' could not be found (are you missing a using directive or an assembly reference?)   D:\Temp\RIA\MyApp.LiveSite\MyApp.Web\WebDataService.svc.cs  12  35  MyApp.Web
  Error   3   The type or namespace name 'IDataServiceConfiguration' could not be found (are you missing a using directive or an assembly reference?) D:\Temp\RIA\MyApp.LiveSite\MyApp.Web\WebDataService.svc.cs  15  46  MyApp.Web
  and a lot of others...</p>
  
  <p>Do you know what is a source of these errors? Am I need to install anything else?</p>
  
  <p>Thanks</p>