.NET でプロセスの実行時間を正確に追跡するにはどうすればよいですか?

<code class="language-csharp">using System;
using System.Management;

public class ProcessMonitor
{
    public static void Main(string[] args)
    {
        // Watch for process start events
        using (ManagementEventWatcher startWatch = new ManagementEventWatcher(new WqlEventQuery("SELECT * FROM Win32_ProcessStartTrace")))
        {
            startWatch.EventArrived += StartWatch_EventArrived;
            startWatch.Start();

            // Watch for process stop events
            using (ManagementEventWatcher stopWatch = new ManagementEventWatcher(new WqlEventQuery("SELECT * FROM Win32_ProcessStopTrace")))
            {
                stopWatch.EventArrived += StopWatch_EventArrived;
                stopWatch.Start();

                Console.WriteLine("Monitoring process starts and stops. Press any key to exit.");
                Console.ReadKey();
            }
        }
    }

    private static void StopWatch_EventArrived(object sender, EventArrivedEventArgs e)
    {
        Console.WriteLine($"Process stopped: {e.NewEvent.Properties["ProcessName"].Value}");
    }

    private static void StartWatch_EventArrived(object sender, EventArrivedEventArgs e)
    {
        Console.WriteLine($"Process started: {e.NewEvent.Properties["ProcessName"].Value}");
    }
}</code>