C# - Block master-thread until slave-thread executed ManualResetEvent.WaitOne()

I've a question regarding thread handling in C#:

I have a master thread who creates a slave thread with

pollthread = new Thread(doPollThread);
pollthread.Start(this);

I have a

ManualResetEvent resetevent

the slave thread executes an endless loop like

private static void doPollThread(object thisObject){

    SpeedCounterDevice sc = (SpeedCounterDevice) thisObject;
    while (true) {

        sc.resetevent.WaitOne();

        //do some work ....

        Thread.Sleep(400);

    }
}

The purpose of the slave thread is to poll an external device through a network socket (how are you .. how are you ... get measurement result ... how are you ....) but this socket is created in functions of the master thread And I want to connect the socket through an UI-Button-Press, disconnect through the UI, connect again, .... in the master thread So control of the socket should belong to the master thread, only the actual data transfer over the network should be done by the slave

Now I want to suspend the slave thread in a function running in the master thread like

resetevent.Reset();

to disconnect the network connection later on when the slave loop is finished

But then I want to wait in the master thread (block it) until the slave thread executed WaitOne(), but without any possibility to come into a deadlock or something else problematic ... (I want to finish the loop without interrupt it)

Yes, you can create another ResetEvent, block the master thread, but if the slave is getting the resetEvent right between signalling the master thread and executing WaitOne(), he will sleep but will not wake up the master thread ...

Is there any safe nice way to solve this problem?

Thank you!

Regards, Hans Juergen

Copyright Notice：Content Author:「Funky」，Reproduced under the CC 4.0 BY-SA copyright license with a link to the original source and this disclaimer.
Link to original article：https://stackoverflow.com/questions/72600946/c-sharp-block-master-thread-until-slave-thread-executed-manualresetevent-waito