private IEnumerable <UnusedPackage> GetUnusedPackages(FrameworkName targetFramework, bool lookAtUnusedUsings)
{
var usedAssemblyPaths = RoslynProject.Documents
.SelectMany(d => d.GetUsedAssemblies(lookAtUnusedUsings))
.Select(a => a.Identity.Location)
.Where(p => !string.IsNullOrEmpty(p))
.Distinct().ToList();
return(Packages
// Packages not referenced by other packages ...
.GetDirectPackages(targetFramework)
// ... that have assemblies ...
.Where(p => p.AssemblyReferences.Any())
// ... and the namespaces in those assemblies do not exist in the project ...
.Where(p => p.GetTypes().Select(t => t.FullName).Intersect(MsBuildProject.GetNamespaces()).IsEmpty())
// ... and the assemblies are not used by symbols in the project
.Where(p => !p.GetAssemblyPaths().Any(a => usedAssemblyPaths.Any(u => u.Contains(a))))
.Where(p => !p.Id.Equals("Aspose.Words")) // Roslyn seems to have a problem with this package
.Select(p => new UnusedPackage(p)));
}