Simple IoC container

gistfile1.txt

    internal class ResourceManager
    {
        #region Singleton
        private static Lazy<ResourceManager> instance = new Lazy<ResourceManager>(() => new ResourceManager());

        internal static ResourceManager Instance { get { return instance.Value; } }

        private ResourceManager()
        {

        }
        #endregion

        internal IAuthenticationService AuthenticationService { get; private set; }
        internal ITripService TripService { get; private set; }
        internal IContactService ContactService { get; private set; }
        internal IAlertService AlertService { get; private set; }
        internal ICheckpointService CheckpointService { get; private set; }

        internal void Configure(IAuthenticationService authService, ITripService tripService,
                              IContactService contactService, IAlertService alertService,
                              ICheckpointService checkpointService)
        {
            AuthenticationService = authService;
            TripService = tripService;
            ContactService = contactService;
            AlertService = alertService;
            CheckpointService = checkpointService;
        }