NuGet.SharedPackageRepository.GetRepositoryPaths C# (CSharp) Method

        internal IEnumerable<string> GetRepositoryPaths()
        {
            // The store file is in this format
            // <repositories>
            //     <repository path="..\packages.config" />
            // </repositories>
            XDocument document = GetStoreDocument();

            // The document doesn't exist so do nothing
            if (document == null)
            {
                return Enumerable.Empty<string>();
            }

            // Only save if we changed the document
            bool requiresSave = false;

            // Paths have to be relative to the this repository           
            var paths = new HashSet<string>();
            foreach (var e in GetRepositoryElements(document).ToList())
            {
                string path = NormalizePath(e.GetOptionalAttributeValue("path"));

                if (String.IsNullOrEmpty(path) ||
                    !FileSystem.FileExists(path) ||
                    !paths.Add(path))
                {

                    // Skip bad entries
                    e.Remove();
                    requiresSave = true;
                }
            }

            if (requiresSave)
            {
                SaveDocument(document);
            }

            return paths;
        }