Queue up BackgroundWorkers OR wait for BackgroundWorker to finish without blocking the UI

This is a new one, so thought I'd put it here.
I have a procedure that uses a BackgroundWorker and updates a log window in my main form. Simple stuff.
I use this procedure for more than one task, incorporating more than one procedure. In the case I solved here, I had to wait for one BackgroundWorker to complete before moving on with the code in the Main Thread. I couldn't trigger it in the RunWorkerComplete event, as the BackgroundWorker was used multiple times throughout the application.
So here it is: (I used ThreadPool and Invoked the actions!)

private void Button1_Click(object sender, EventArgs e)
        {
            ThreadPool.QueueUserWorkItem(delegate
            {
                Invoke(new Action(delegate { ProcedureWithBackgroundWorker(); }));

                while (BW.IsBusy)
                {
                    Thread.Sleep(100);
                }

                Invoke(new Action(delegate { SecondProcedureThatWaitsForTheOneAboveToFinish(); }));
            });
        }