Multi-threaded polling process - base for NT-Service

using System;
using System.Threading;
using System.Diagnostics;

namespace Threads
{
	/// <summary>
	/// Summary description for CWorker.
	/// </summary>
	public class WorkerThread
	{
		private int				_nID;
		private AutoResetEvent	_JobDoneEvent;

		/// <summary>
		/// WorkerThread constructor. The thread is created in stopped state.
		/// </summary>
		/// <param name="nID">ID for this thread</param>
		/// <param name="oJobDoneEvent">Event to set when job is completed</param>
		public WorkerThread(int nID, AutoResetEvent oJobDoneEvent)
		{
			_nID = nID;
			_JobDoneEvent = oJobDoneEvent;
		}
		/// <summary>
		/// Start the thread
		/// </summary>
		/// <returns>true if thread is started, false if problems occur</returns>
		public bool Start()
		{
			return ThreadPool.QueueUserWorkItem(new WaitCallback(this.ThreadCallBack));
		}
		/// <summary>
		/// WorkerThread callback
		/// </summary>
		private void ThreadCallBack(object oNotUsed)
		{
			Trace.WriteLine(String.Format("  Thread [{0}] starting.", _nID));

			//
			// Doing extremelly important thing: take a small break !
			//
			try
			{
				DoSomethingUseful();
			}
			catch(Exception E)
			{
				Trace.WriteLine(String.Format("  Thread [{0}] exception.\r\n{1}", _nID, E.ToString()));
			}

			Trace.WriteLine(String.Format("  Thread [{0}] completed.", _nID));
			//
			// Set Job Done Flag
			//
			_JobDoneEvent.Set();
		}
		/// <summary>
		/// Working thread main task
		/// </summary>
		private void DoSomethingUseful()
		{
			//
			// TODO: add here your code.
			//

			//
			// Very useful: a small nap !
			//
			Random oRnd = new Random();
			int  nSleepTime = oRnd.Next(2000);
			Thread.Sleep(nSleepTime);
		}
	}
}