System.Diagnostics.Tests.ProcessThreadTests.TestStartTimeProperty C# (CSharp) Method

        public async Task TestStartTimeProperty()
        {
            TimeSpan allowedWindow = TimeSpan.FromSeconds(1);

            using (Process p = Process.GetCurrentProcess())
            {
                // Get the process' start time
                DateTime startTime = p.StartTime.ToUniversalTime();

                // Get the process' threads
                ProcessThreadCollection threads = p.Threads;
                Assert.NotNull(threads);
                Assert.NotEmpty(threads);

                // Get the current time
                DateTime curTime = DateTime.UtcNow;

                // Make sure each thread's start time is at least the process'
                // start time and not beyond the current time.
                int passed = 0;
                foreach (ProcessThread t in threads.Cast<ProcessThread>())
                {
                    try
                    {
                        Assert.InRange(t.StartTime.ToUniversalTime(), startTime - allowedWindow, curTime + allowedWindow);
                        passed++;
                    }
                    catch (InvalidOperationException)
                    {
                        // The thread may have gone away between our getting its info and attempting to access its StartTime
                    }
                }
                Assert.True(passed > 0, "Expected at least one thread to be valid for StartTime");

                // Now add a thread, and from that thread, while it's still alive, verify
                // that there's at least one thread greater than the current time we previously grabbed.
                await Task.Factory.StartNew(() =>
                {
                    p.Refresh();
                    try
                    {
                        Assert.Contains(p.Threads.Cast<ProcessThread>(), t => t.StartTime.ToUniversalTime() >= curTime - allowedWindow);
                    }
                    catch (InvalidOperationException)
                    {
                        // A thread may have gone away between our getting its info and attempting to access its StartTime
                    }
                }, CancellationToken.None, TaskCreationOptions.LongRunning, TaskScheduler.Default);
            }
        }