NuGet.UserSettings.UserSettings C# (CSharp) Méthode

        public UserSettings(IFileSystem fileSystem)
        {
            if (fileSystem == null) {
                throw new ArgumentNullException("fileSystem");
            }
            _fileSystem = fileSystem;
            _configLocation = Path.Combine(Environment.GetFolderPath(Environment.SpecialFolder.ApplicationData), "NuGet", "NuGet.Config");
            _config = XmlUtility.GetOrCreateDocument("configuration", _fileSystem, _configLocation);
        }