public void TestGetNumberOfUsersOnlineWhenNoneAreOnline()
        {
            var config = new NameValueCollection(_config);

            var provider = new MongoMembershipProvider();
            provider.Initialize(DefaultName, config);

            MembershipCreateStatus status;
            provider.CreateUser("test", "123456", "*****@*****.**", "Question", "Answer", true, null, out status);

            var numberOfUsersOnline = provider.GetNumberOfUsersOnline();
            Assert.AreEqual(0, numberOfUsersOnline);
        }