show TPL using more threads than CPUs

TPLThreads.cs

int threadCount = Environment.ProcessorCount + 5;
Parallel.ForEach(Enumerable.Range(0, threadCount),
						new ParallelOptions { MaxDegreeOfParallelism = -1 }, item =>
			                                                {
			                                                    Interlocked.Increment(ref level);
			                                                    Trace.WriteLine(string.Format("in {0} {1}", item,
			                                                                    	            level));
			                                                    Stopwatch sw = Stopwatch.StartNew();
																while ((sw.Elapsed.TotalSeconds < TimeSpan.FromSeconds(Environment.ProcessorCount * 25).TotalSeconds))
																{
																}
			                                                    Trace.WriteLine(string.Format(
			                                                        "leaving {0} {1}", item, level));
			                                                    Interlocked.Decrement(ref level);
			                                                });