Not sure if this is what you are looking for but below is the code snippet
which shows how to wait and signal threads
/****************************/
using System;
using System.Threading;

namespace TestHarness
{
   class Program
   {  
       //create an auto reset wait event handle
       public AutoResetEvent _workerthreadEvent = new AutoResetEvent(false);
       public AutoResetEvent _mainthreadEvent = new AutoResetEvent(false);
       private bool _isRunning = true;
     
       public bool Running
       { get { return _isRunning; } set { _isRunning = value; } }

       static void Main(string[] args)
       {
           Program program = new Program();
           //create a background thread which will be blocked on _restevent
           Thread backgroundThread = new Thread(new
ThreadStart(program.DoSomeWork));
           //start the thread
           backgroundThread.Start();
           //main thread sleeps for 5 seconds
           Thread.Sleep(5000);
           //signal the worker thread
           program.SignalWorkerThread();
           Console.WriteLine("Main Thread has signaled the worked thread");
           //wait on signal from work thread
           program.WaitForSignalFromWorkThread();
           //set running to false to terminate the worker thread
           program.Running = false;
           program.SignalWorkerThread();
       }

       public void SignalWorkerThread()
       {
           _workerthreadEvent.Set();
       }

       public void WaitForSignalFromWorkThread()
       {
           _mainthreadEvent.WaitOne();
       }

       public void DoSomeWork()
       {
           while (_isRunning)
           {
               //wait on event handle to be signaled
               _workerthreadEvent.WaitOne();
               Console.WriteLine("Worker thread Signaled");
               _mainthreadEvent.Set();
           }
       }
           
   }
}