reading events from EventPipe example

ReadFromEventPipe.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Threading.Tasks;
using System.Text;
using Microsoft.Diagnostics.NETCore.Client;
using System.Diagnostics.Tracing;
using Microsoft.Diagnostics.Tracing.Parsers;
using Microsoft.Diagnostics.Tracing;

namespace eventpipeclienttest
{
    class Program
    {
        static async Task Main(string[] args)
        {
            var client = new DiagnosticsClient(int.Parse(args[0]));
            var providers = new[]
            {
                new EventPipeProvider("Microsoft-Diagnostics-DiagnosticSource", EventLevel.Informational, 0x3)
            };
            Console.WriteLine($"jkl");
            using (var session = client.StartEventPipeSession(providers, false))
            {
                Console.WriteLine($"ghi");
                using (var evsrc = new EventPipeEventSource(session.EventStream))
                {
                    Console.WriteLine($"abc");

                    evsrc.Dynamic.All += (traceevt) =>
                    {
                        try
                        {
                            Console.WriteLine($"{traceevt.ActivityID}, {traceevt.Channel}, {traceevt.ContainerID}, {traceevt.EventName}, {traceevt.ProviderName}, {traceevt.TaskName}, {traceevt.EventDataLength}, {traceevt.PayloadNames.Length}");
                            var sb = new StringBuilder();
                            // traceevt.ToXml(sb);
                            // Console.WriteLine($"{sb.ToString()}");
                            foreach (var pname in traceevt.PayloadNames)
                            {
                                var pobj = traceevt.PayloadByName(pname);
                                Console.WriteLine($"  {pname} = '{pobj}'");
                                if (pobj is IDictionary<string, object>[] par)
                                {
                                    // foreach(var tevname in tev.PayloadNames)
                                    // {
                                    //     Console.WriteLine($"    {tevname} = {tev.PayloadByName(tevname)}");
                                    // }
                                    foreach (var pdic in par)
                                    {
                                        // Console.WriteLine("    {0}", string.Join(",", pdic.Keys));
                                        Console.WriteLine("    {0}",
                                            string.Join(" : ", pdic.Select(x => x.Key + "=" + x.Value.ToString())));
                                    }
                                }
                            }
                        }
                        catch (Exception e)
                        {
                            Console.WriteLine($"error in dynamic all:{e}");
                        }
                    };
                    Console.WriteLine($"def");
                    await Task.WhenAll(
                        Task.Run(() =>
                        {
                            Console.WriteLine($"begin process, press enter then exit");
                            Console.ReadLine();
                            evsrc.StopProcessing();
                            session.Stop();
                            Console.WriteLine($"stop process done");
                        }),
                        Task.Run(() =>
                        {
                            var ret = evsrc.Process();
                            Console.WriteLine($"process ret: {ret}");
                        })
                    ).ConfigureAwait(false);
                }
            }
        }
    }
}