C#生产者与消费者问题

/*
 * Created by SharpDevelop.
 * User: huangyibiao
 * Date: 2013/8/27
 * Time: 11:12
 * 
 * To change this template use Tools | Options | Coding | Edit Standard Headers.
 */
using System;
using System.Threading;

namespace ThreadTest
{
	class Program
	{
		public static void Main(string[] args)
		{
			// create share resource 
			Resource sharedResource = new Resource();
			
			ProduceThread produceThread = new ProduceThread(sharedResource);
			ConsumeThread consumeThread = new ConsumeThread(sharedResource);
			
			// create two thread
			Thread producer = new Thread(new ThreadStart(produceThread.Run));
			Thread consumer = new Thread(new ThreadStart(consumeThread.Run));
			
			try
			{
				producer.Start();
				consumer.Start();
				
				producer.Join();
				consumer.Join();
			}
			catch (ThreadStateException e)
			{
				Console.WriteLine(e.ToString());
			}
			
			Console.ReadKey();
		}
		
	}
	
	public class ProduceThread
	{
		/// <summary>
		/// share resource
		/// </summary>
		Resource _resource;
		
		public ProduceThread(Resource res)
		{
			_resource = res;
		}
		
		// begin to produce
		public void Run()
		{
			for (int i = 0; i < 10; ++i)
			{
				_resource.Produce();
			}
		}
	}
	
	public class ConsumeThread
	{
		/// <summary>
		/// share resource
		/// </summary>
		Resource _resource;
		
		public ConsumeThread(Resource res)
		{
			_resource = res;
		}
		
		public void Run()
		{
			for (int i = 0; i < 10; ++i)
			{
				_resource.Consume();
			}
		}
	}
	
	public class Resource
	{
		int _resourceContent = 0;
		bool _flag = false;
		
		/// <summary>
		/// consume method
		/// </summary>
		public void Consume()
		{
			while (!_flag)// if flag == false, enter loop-waiting
				;
			
			Console.WriteLine("Consumer: {0}", _resourceContent);
			
			// set _flag to be false, it means that consuming finished.
			_flag = false;
		}
		
		/// <summary>
		/// puroduce method
		/// </summary>
		public void Produce()
		{
			// if _flag == true, enter loop-waiting
			while (_flag)
				;
			
			++_resourceContent;
			Console.WriteLine("Producer: {0}", _resourceContent);
			_flag = true;// produce finished
		}
	}
}