RE: Help Start and stop Proccess when task manager opens

using System;
using System.Management;

namespace HackForums.Example
{
    class Program
    {
        static void Main()
        {
            ProcessInfo taskmgr = new ProcessInfo("Taskmgr.exe");
            taskmgr.Started += TaskmgrStarted;
            taskmgr.Terminated += TaskmgrTerminated;
            while (true){}
        }

        private static void TaskmgrStarted(object sender, EventArgs e)
        {
            Console.WriteLine("Task Manager is now open");
        }

        private static void TaskmgrTerminated(object sender, EventArgs e)
        {
            Console.WriteLine("Task Manager is now closed");
        }
    }

    public class ProcessInfo
    {
        public delegate void StartedEventHandler(object sender, EventArgs e);
        public delegate void TerminatedEventHandler(object sender, EventArgs e);

        public StartedEventHandler Started;
        public TerminatedEventHandler Terminated;

        public ProcessInfo(string appName)
        {
            string pol = "2";
            string scope = @"\\.\root\CIMV2";
            string queryString =
                $"SELECT * FROM __InstanceOperationEvent WITHIN {pol} WHERE TargetInstance ISA \'Win32_Process\' AND TargetInstance.Name = '{appName}'";

            ManagementEventWatcher watcher = new ManagementEventWatcher(scope, queryString);
            watcher.EventArrived += OnEventArrived;
            watcher.Start();
        }

        private void OnEventArrived(object sender, EventArrivedEventArgs e)
        {
            try
            {
                string eventName = e.NewEvent.ClassPath.ClassName;

                if (string.Compare(eventName, "__InstanceCreationEvent", StringComparison.Ordinal) == 0)
                {
                    Started?.Invoke(this, e);
                }
                else if (string.Compare(eventName, "__InstanceDeletionEvent", StringComparison.Ordinal) == 0)
                {
                    Terminated?.Invoke(this, e);
                }
            }
            catch (Exception ex)
            {
                System.Diagnostics.Debug.WriteLine(ex.Message);
            }
        }
    }
}