public virtual void TestForceUnlock()
        {
            mm.Lock("key1");
            var latch = new CountdownEvent(1);

            var t = new Thread(delegate(object o)
            {
                mm.ForceUnlock("key1");
                latch.Signal();
            });

            t.Start();

            Assert.IsTrue(latch.Wait(TimeSpan.FromSeconds(100)));
            Assert.IsFalse(mm.IsLocked("key1"));
        }