スレッドプールを作成するC＃プログラム

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
class Demo {
   public void one(object o) {
      for (int i = 0; i <= 3; i++) {
         Console.WriteLine("One executed");
      }
   }
   public void two(object o) {
      for (int i = 0; i <= 3; i++) {
         Console.WriteLine("Two executed");
      }
   }
   public void three(object o) {
      for (int i = 0; i <= 3; i++) {
         Console.WriteLine("Three executed");
      }
   }
   static void Main() {
      Demo d = new Demo();
      for (int i = 0; i < 3; i++) {
         ThreadPool.QueueUserWorkItem(new WaitCallback(d.one));
         ThreadPool.QueueUserWorkItem(new WaitCallback(d.two));
         ThreadPool.QueueUserWorkItem(new WaitCallback(d.three));
      }
      Console.Read();
   }
}

Two executed
Two executed
Two executed
Two executed
Two executed
Two executed
Two executed
One executed
One executed
One executed
One executed
One executed
Two executed
Two executed
Three executed
Three executed
Two executed
One executed
Three executed
Two executed
Three executed
One executed
One executed
One executed