主线程中可能有后台工作人员DoWork吗？

Question

Is possible backgroundworker DoWork in main thread? I meant if some device only have one CPU , Is it possible to happen?

PS: I'm working on unity , So run Android & IOS & Windows Platform.

    System.ComponentModel.BackgroundWorker bw = new System.ComponentModel.BackgroundWorker();
    bool inMainThread = false;
    int mainThreadId = System.Threading.Thread.CurrentThread.ManagedThreadId;

    bw.DoWork += (object sender, System.ComponentModel.DoWorkEventArgs e) =>
        {   // Is it possible equal true ??
            inMainThread = mainThreadId == System.Threading.Thread.CurrentThread.ManagedThreadId;
        }

Answer 1

No it is not possible. A BackgroundWorker will always do its work on an seperate thread.

To the point with an system with only one CPU. An OS runs many programs asynchronous and every program can have many threads. The OS will schedule all this threads to run at somepoint on any available CPU. This is crucial to maintain a smooth running system, especially when a system has only one CPU.

If you want to know more you could look here or here and for a start I would recommend this video.