.NET CPU Usage EventCounter

CpuUsage.cs

using System.Diagnostics.Tracing;
using System.Security.Cryptography;
using System.Text;

public class Program
{
    public static void Main(string[] args)
    {
        var listener = new SystemRuntimeEventCounterListener();
        Task.Run(async () =>
        {
            while (true)
            {
                await Task.Delay(1000);
                _ = Task.Run(() =>
                {
                    for (var i = 0; i < 1_000_000; ++i)
                    {
                        SHA512.HashData(Encoding.UTF8.GetBytes(Guid.NewGuid().ToString()));
                    };
                });
            }
        });

        Console.WriteLine("Press any key to exit");
        Console.ReadKey();
    }
}

internal sealed class SystemRuntimeEventCounterListener : EventListener
{        
    protected override void OnEventSourceCreated(EventSource source)
    {
        if (source.Name.Equals("System.Runtime"))
        {
            Dictionary<string, string?>? refreshInterval = new() { ["EventCounterIntervalSec"] = "0.5" };
            EnableEvents(source, EventLevel.Informational, (EventKeywords)(-1), refreshInterval);
        }
    }

    public double CpuUsage { get; private set; }

    protected override void OnEventWritten(EventWrittenEventArgs eventData)
    {
        if (eventData.EventName!.Equals("EventCounters"))
        {
            for (int i = 0; i < eventData.Payload!.Count; i++)
            {
                if (eventData.Payload![i] is IDictionary<string, object> eventPayload)
                {
                    if (eventPayload.TryGetValue("Name", out var name) && "cpu-usage".Equals(name))
                    {
                        if (eventPayload.TryGetValue("Mean", out var mean))
                        {
                            CpuUsage = (double)mean;
                            Console.WriteLine($"cpu-usage: {CpuUsage}");
                        }
                    }
                }
            }
        }
    }
}