//引入命名空间
using System;
using System.Threading;

public class ThreadWork 
{
   public static void DoWork()
   {
      Console.WriteLine("Working thread..."); 
   }
}

class ThreadStateTest
{
   public static void Main()
   {
      ThreadStart myThreadDelegate = new ThreadStart(ThreadWork.DoWork);
      Thread myThread = new Thread(myThreadDelegate);
      myThread.Start();
      Thread.Sleep(0);
      Console.WriteLine("In main. Attempting to restart myThread.");
      try 
      {
         myThread.Start();
      }
      catch (ThreadStateException e)
      {
         Console.WriteLine("Caught: {0}", e.Message);
      }
   }
}