public void TestMethod1()
        {
            Singleton.FiveMinutesSingleton instance1 = Singleton.FiveMinutesSingleton.Instance;
            Singleton.FiveMinutesSingleton instance2 = Singleton.FiveMinutesSingleton.Instance;

            Assert.AreSame(instance1, instance2);
        }
        public void TestMethod2()
        {
            Singleton.FiveMinutesSingleton instance1 = Singleton.FiveMinutesSingleton.Instance;
            Thread.Sleep(5001);
            Singleton.FiveMinutesSingleton instance2 = Singleton.FiveMinutesSingleton.Instance;

            Assert.AreNotSame(instance1, instance2);
        }