How to call back the thread which is suspended using resume()

namespace CAthreads
{

    class clsthread2
    {
        Thread t1;
        public void thread1()
        {
            for (int i = 0; i < 10; i++)
            {

                t1 = Thread.CurrentThread;
                Console.WriteLine(t1.Name + "=" + i);
                if (i == 5)
                {
                    Console.WriteLine(t1.Name + " is going to suspend");
                    t1.Suspend();

                }
            }
        }

       // Created new method to resume thread...
        public void ResumeThread()
        {
            if (t1.ThreadState == ThreadState.Suspended)
            {
                t1.Resume();
            }
        }
    }

    class Class1
    {
        static void Main()
        {
            clsthread2 obj1 = new clsthread2();
            obj1.ResumeThread();   //Method of Class clsthread2
            
            ThreadStart tstart1 = new ThreadStart(obj1.thread1);
            ThreadStart tstart2 = new ThreadStart(obj1.thread1);
            Thread thr1 = new Thread(tstart1);
            Thread thr2 = new Thread(tstart1);
            thr1.Name = "NTR";
            thr2.Name = "ANR";
            thr1.Start();
            thr2.Start();
            Console.Read();
        }
    }
}