Why the "RunWorkerCompleted" never comes after pressing ENTER?

[senglory]

using System;
using System.ComponentModel ;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Reflection;


namespace Retriever
{
    class Program
    {
        static void Main(string[] args)
        {
            BackgroundWorker bw = new BackgroundWorker();
            bw.WorkerSupportsCancellation = true;
            

            bw.DoWork += new DoWorkEventHandler(bw_DoWork);
            bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
            bw.RunWorkerAsync();
            Console.WriteLine("Press ENTER to exit...");
            Console.ReadLine();
            bw.CancelAsync();
            Thread.Sleep(5000);
        }

        static void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e)
        {
            if (e.Cancelled )
                cls.Suspend ();
        }

        static void bw_DoWork(object sender, DoWorkEventArgs e)
        {
 for (int i = 0; i < 10000; i++){ Thread.Sleep(1000); Console.WriteLine(i); if (e.Cancel){e.Result = "done"; return ;}}        }
    }
}

If to hit Enter after running, the bw_RunWorkerCompleted() will be never invoked. Why?

[cBreeze4u]

the code does not compile:

cls.Suspend (); <--- cls does not exist in the current context


You may be running a previously compiled version; not the logic you think

[JonnyPoet]

...
 using System;
using System.ComponentModel;
using System.Collections.Generic;
using System.Text;
using System.Threading;
using System.Reflection;


namespace Retriever {
    class Program {
        static BackgroundWorker bw = new BackgroundWorker();
        static void Main(string[] args) {
            
            bw.WorkerSupportsCancellation = true;


            bw.DoWork += new DoWorkEventHandler(bw_DoWork);
            bw.RunWorkerCompleted += new RunWorkerCompletedEventHandler(bw_RunWorkerCompleted);
            bw.RunWorkerAsync();
            Console.WriteLine("Press ENTER to exit...");
            Console.ReadLine();
            bw.CancelAsync(); // This only assigns that the thread should be cancelled !!
            Thread.Sleep(5000);
        }

        static void bw_RunWorkerCompleted(object sender, RunWorkerCompletedEventArgs e) {
            if (e.Cancelled)
                Console.WriteLine("Cancelled"); 
                //cls.Suspend();
        }

        static void bw_DoWork(object sender, DoWorkEventArgs e) {
            for (int i = 0; i < 10000; i++) { 
                Thread.Sleep(1000);
                Console.WriteLine(i);
                if (bw.CancellationPending) {
                    e.Result = "done";
                    e.Cancel = true;
                    return;
                }
            }
        
        }
    }
}

Your backgroundprocess will be assigned to be cancelled but isn't really cancelled yet ( The cancellation is pending until its acknowledged in the loop) , so you will not get workerComleted fired. Use it as I showed and it will do the job