title: AssemblyInfo.cs could not be opened - Unspecified Error
body: <p>I was working offline from TFS for a while in my solution.  I went back online (TFS) and when I tried to compile my solution I get this for a project I had added to this solution.</p>
  
  <blockquote>
    <p>AssemblyInfo.cs could not be opened - Unspecified Error</p>
  </blockquote>
  
  <p>I checked and that file is there so not sure why it can't utilize/read it.</p>
  
  <p>This is an ASP.NET Web Application and the project it's complaining about here is just a regular C# class library project.</p>