anchor.diff:  let restore proj =
       let opts =
           { DotnetOptions.Default with
  -            WorkingDirectory = __SOURCE_DIRECTORY__    }
  +            WorkingDirectory = __SOURCE_DIRECTORY__
  +        }
       (Dotnet  opts (sprintf "restore %s" (Path.getFullName proj))).Messages |> Seq.iter trace
   
   Target.Create "Build" (fun _ ->
  
positive.code:             proj
              |> MsBuild.build (fun opts ->
                  { opts with
                      Targets = ["Build"]
                      Verbosity = Some MSBuildVerbosity.Minimal
                      Properties =
                        [ "VisualStudioVersion", "15.0"
                          "Verbosity", "Minimal"
                          "OutputPath", "tests/bin"
                          "Configuration", "Release" ]}
              )
          )
  
  
negative.code:     solutionFile
      |> MsBuild.build (fun opts ->
          { opts with
              RestorePackagesFlag = true
              Targets = ["Rebuild"]
              Verbosity = Some MSBuildVerbosity.Minimal
              Properties =
  