private IEnumerable <MismatchedGuid> GetBadProjectRefGuids()
{
var solutionProjects = SolutionFile.FromFile(RoslynProject.Solution.FilePath).Projects;
return(MsBuildProject.GetProjectReferences()
.Where(r => !r.EqualByGuid(GetSolutionProjectFromProjectReference(r, solutionProjects)))
.Select(r => new MismatchedGuid(r.GetProjectGuid(), r.GetProjectName(), "Project Reference")));
}