Pass each list item to a new thread one by one [duplicate]

Answer 1

You should make local copy of variable. Try this:

    foreach (string server in stringList)
    {
        string local = server;
        ThreadStart work = delegate { Threadjob(local); };
        new Thread(work).Start();
        //Thread.Sleep(10); // 10 ms delay of main thread
    }

More info here: Captured variable in a loop in C#

Answer 2

OK, I think I get it.
Froeach loop hold a pointer, and changes it on each iteration. Sometimes, the thread is created, but still not running. meanwhile, the loop changes the pointer at the following iteration, and when the thread starts its job, it get the current pointer's value (the subsequent string).

BTW, I found another solution here, how to pass parameters to main function of the thread, so I fixed my loop and it works properly now

foreach (string server in stringList)
{
    Thread thread1 = new Thread(new ParameterizedThreadStart(Threadjob));
    thread1.Start(server); 
}

Answer 3

new Thread(Threadjob).Start(server);

Done! However, it may be more advisable to use tasks rather than threads - or at least ThreadPool.