namespace ConsoleApplication1
{
    class Program
    {
        static void Main(string[] args)
        {
            for (int i = 0; i < 100;i++ )
            {
                Class1 classtest = new Class1();
                classtest.startdownthread();
            }
            Console.WriteLine("end of for loop");
            Thread.Sleep(1000);
            Console.ReadKey();
        }
    }
    class Class1
    {
        private int[] age;
        private Thread CalulateThread;


        public Class1()
        {
            CalulateThread = null;
            age = new int[1024];
        }
        public void startdownthread()
        {
            CalulateThread = new Thread(Caculate);
            CalulateThread.IsBackground = true;
            CalulateThread.Start();
        }

        private void Caculate()
        {
            //做一些很费时的工作如数值计算等
            Thread.Sleep(1000);
            Console.WriteLine(GetHashCode());
            return;
        }
    }
}