private static void RunGeneration(IAnnotator annotator, NugetSpec nuspec, Args parsedArgs)
        {
            var version = parsedArgs.Version ?? new Version("1.0.0.0");
            var dir = parsedArgs.Directory ?? new DirectoryInfo(Environment.CurrentDirectory);
            var fixedSpec = nuspec.WithVersion(version);
            annotator.CreateNugetPackage(fixedSpec, dir);

            Console.WriteLine($"Generated version {version}  in {dir.FullName}");
        }