Why doesn't this code return expected result?

Question

I am practicing multitasking and tried this code but it doesn't work as I expected it to.

I was expecting for the the workTask to run first printing "working..." throughout the loop then continue with newTask and print "moreWorkThread: working..." throughout the loop. At first I thought "workThread: Done" will be printed at the end but then I understood from output that it can run anytime between the other ones.

I don't understand the rest of the behaviour at all.
newTask doesn't run at all and the loop in someWork never gets completed either.

Can somebody please explain it to me? I want to know why this code is behaving so and what mods can I make to give expected output

• run someWork
• complete the loop
• continueWith moreWork

• complete loop.

   public static void Main() { Task workTask = new Task(someWork); workTask.Start(); Console.WriteLine("WorkThread: Done!"); Task newTask = workTask.ContinueWith(moreWork); } static public void someWork() { for(int i = 0; i < 16; i++) { Console.WriteLine("WorkThread: working..."); } } static public void moreWork(Task task) { for(int i = 0; i < 8; i++) { Console.WriteLine("moreWorkThread: working..."); } }

sample output:

WorkThread: Done!

WorkThread: working...

WorkThread: working...

Answer 1

var task = Task.Run(() =>
        {
            someWork();
        });
        await task;

        Console.WriteLine("WorkThread: Done!");
        await task.ContinueWith((t) => {morework() } );

You'd better use async await. Await will wait for somework to finish executing first before you say "done".