public void IServiceProviderExtensions_GetMefService_NullArgChecks()
        {
            IServiceProvider nullServiceProvider = null;

            Exceptions.Expect <ArgumentNullException>(() => nullServiceProvider.GetMefService <IService>());
            Exceptions.Expect <ArgumentNullException>(() => IServiceProviderExtensions.GetMefService <IService>(nullServiceProvider));
        }