using System;
using System.Threading;

public class Example
{
    static Thread thread1, thread2;

    public static void Main()
    {
        thread1 = new Thread(ThreadProc);
        thread1.Name = "Thread1";
        thread1.Start();

        thread2 = new Thread(ThreadProc);
        thread2.Name = "Thread2";
        thread2.Start();
    }

private static void ThreadProc()
{
    Console.WriteLine("nCurrent thread: {0}", Thread.CurrentThread.Name);
    if (Thread.CurrentThread.Name == "Thread1" &&
        thread2.ThreadState != ThreadState.Unstarted)
            thread2.Join();

    Thread.Sleep(4000);
    Console.WriteLine("nCurrent thread: {0}", Thread.CurrentThread.Name);
    Console.WriteLine("Thread1: {0}", thread1.ThreadState);
    Console.WriteLine("Thread2: {0}n", thread2.ThreadState);