Question

Thread.Suspend() method is obsolete as you know. I want to suspend thread immidiately when button click event comes. I used Thread.Suspend() and it works perfect but everyone suggest that using Thread.Suspend() method is not a good method to suspend the task. I used a flag to suspend the task but every time when a button click event comes, i have to wait to exit from task. I used Thread.IsAlive flag to wait the thread to exit but this method freezes form.

void ButtonClickEvent(object sender, ButtonClickEventArgs e)
{
    TheadExitFlag = false;

    if(MyThread != null)
    {
        while(MyThread.IsAlive);
        //MyThread.Suspend();
    }
}

void MyTask(void)
{
    while(TheadExitFlag)
    {
        // some process
        Thread.Sleep(5000);
    }
}

How can i suspend the thread immidiately?

Answer 1

There is no alternative with the same functionality, AFAIK. I am not sure if the problems with an OS Suspend() could be worked around within the language/libraries, but no attempt has been made to do so, so maybe it’s too difficult or even sensibly impossible.

Until such an alernative exists, you are reduced to polling for a suspend flag and then waiting on some synchronization object for a ‘resume’ signal. I have used AutoResetEvent for this.