anchor.diff:              [
                   r.Project(multipartParser)
                   r.Project(main)
  +                r.NuGet("WebSharper.Html").Reference()
               ])
   
   let testHost =
  
positive.code: let bt =
      BuildTool().PackageId("WebSharper.Owin")
          .VersionFrom("WebSharper")
  
  let multipartParser =
      bt.MSBuild("HttpMultipartParser/HttpMultipartParser.csproj")
  
negative.code:         .References(fun r ->
              [
                  r.Project(multipartParser)
                  r.NuGet("Owin").ForceFoundVersion().Reference()
                  r.NuGet("Microsoft.Owin").ForceFoundVersion().Reference()
                  r.Assembly("System.Configuration")
                  r.Assembly "System.Web"
              ])
  