private static void SingelThread_HashCompositeOnDisk()
        {
            Console.WriteLine("SingelThread_HashOnDisk");
            var dict = new MMFDictionary<int, Person>("SingelThread_HashCompositeOnDisk", 100000);

            Stopwatch sw = Stopwatch.StartNew();
            for (int i = 0; i < MaxCount; i++)
            {

                dict.Add(i, new Person() { Id = i, Name = "Name" + i });
                Person p = null;
                if (!dict.TryGetValue(i,out p)) throw new Exception();
                if (i/100000 == 0) {
                    Console.WriteLine("Count: " + i);
                }
            }
            sw.Stop();
            Console.WriteLine(sw.Elapsed);
        }
        private static void Threaded_HashCompositeOnDisk()
        {
            Console.WriteLine("Threaded_HashOnDisk");
            var dict = new MMFDictionary<string, Person>("Threaded_HashCompositeOnDisk", 100000);

            Console.WriteLine("Queuing {0} items to Thread Pool", MaxCount);
            Console.WriteLine("Queue to Thread Pool 0");
            System.Collections.Generic.List<WaitHandle> handles = new System.Collections.Generic.List<WaitHandle>();
            Stopwatch sw = Stopwatch.StartNew();
            for (int iItem = 1; iItem < 20; iItem++)
            {
                ManualResetEvent mre = new ManualResetEvent(false);
                handles.Add(mre);
                ThreadPool.QueueUserWorkItem(d =>
                {
                    for (int i = 0; i < MaxCount / 20; i++)
                    {
                        string key = Guid.NewGuid().ToString();
                        dict.Add(key, new Person { Id = i, Name = "Name" + i });
                        Person p = null;
                        if (!dict.TryGetValue(key,out p)) throw new Exception();
                    }
                    mre.Set();
                }, null);
            }
            Console.WriteLine("Waiting for Thread Pool to drain");
            WaitHandle.WaitAll(handles.ToArray());
            sw.Stop();
            Console.WriteLine("Thread Pool has been drained (Event fired)");
            Console.WriteLine(sw.Elapsed);
        }