Csharp/CSharp Tutorial/Thread/Thread State

ThreadState property

using System;
using System.Threading;
class MainClass
{
  public static void Countdown() 
  {
    for (int i = 10; i > 0; i--)  {
      Console.Write(i.ToString() + " ");
    }
  }
  public static void DumpThreadState (Thread t ) 
  {
    Console.Write("Current state: ");
    if ((t.ThreadState & ThreadState.Aborted) == ThreadState.Aborted)
      Console.Write("Aborted ");
    if ((t.ThreadState & ThreadState.AbortRequested) == ThreadState.AbortRequested)
      Console.Write("AbortRequested ");
    if ((t.ThreadState & ThreadState.Background) == ThreadState.Background)
      Console.Write("Background ");
    if ((t.ThreadState & (ThreadState.Stopped | ThreadState.Unstarted | ThreadState.Aborted)) == 0)
      Console.Write("Running ");
    if ((t.ThreadState & ThreadState.Stopped) == ThreadState.Stopped)
      Console.Write("Stopped ");
    if ((t.ThreadState & ThreadState.StopRequested) == ThreadState.StopRequested)
      Console.Write("StopRequested ");
    if ((t.ThreadState & ThreadState.Suspended) == ThreadState.Suspended)
      Console.Write("Suspended ");
    if ((t.ThreadState & ThreadState.SuspendRequested) == ThreadState.SuspendRequested)
      Console.Write("SuspendRequested ");
    if ((t.ThreadState & ThreadState.Unstarted) == ThreadState.Unstarted)
      Console.Write("Unstarted ");
    if ((t.ThreadState & ThreadState.WaitSleepJoin) == ThreadState.WaitSleepJoin)
      Console.Write("WaitSleepJoin ");
  }
  public static void Main() 
  {
    Thread t2 = new Thread(new ThreadStart(Countdown));
    DumpThreadState(t2);
    t2.Start();
    DumpThreadState(t2);
    Countdown();
    t2.Abort();
    DumpThreadState(t2);
  }
}

Current state: Unstarted 10 9 8 7 6 5 4 3 2 1 Current state: Stopped 10 9 8 7 6 5 4 3 2 1 Current st
ate: Stopped

Use IsAlive to wait for threads to end

using System; 
using System.Threading; 
 
class MyThread { 
  public int count; 
  public Thread thrd; 
 
  public MyThread(string name) { 
    count = 0; 
    thrd = new Thread(this.run); 
    thrd.Name = name; 
    thrd.Start(); 
  } 
 
  void run() { 
    Console.WriteLine(thrd.Name + " starting."); 
 
    do { 
      Thread.Sleep(500); 
      Console.WriteLine("In " + thrd.Name + 
                        ", count is " + count); 
      count++; 
    } while(count < 10); 
 
    Console.WriteLine(thrd.Name + " terminating."); 
  } 
} 
class MainClass { 
  public static void Main() { 
    Console.WriteLine("Main thread starting."); 
 
    MyThread mt1 = new MyThread("Child #1"); 
    MyThread mt2 = new MyThread("Child #2"); 
    MyThread mt3 = new MyThread("Child #3"); 
 
    do { 
      Console.Write("."); 
      Thread.Sleep(100); 
    } while (mt1.thrd.IsAlive && 
             mt2.thrd.IsAlive && 
             mt3.thrd.IsAlive); 
 
    Console.WriteLine("Main thread ending."); 
  } 
}

Main thread starting.
Child #1 starting.
Child #2 starting.
Child #3 starting.
.....In Child #1, count is 0
In Child #2, count is 0
In Child #3, count is 0
.....In Child #1, count is 1
In Child #2, count is 1
In Child #3, count is 1
....In Child #1, count is 2
In Child #2, count is 2
In Child #3, count is 2
.....In Child #1, count is 3
In Child #2, count is 3
In Child #3, count is 3
....In Child #1, count is 4
In Child #2, count is 4
In Child #3, count is 4
.....In Child #1, count is 5
In Child #2, count is 5
In Child #3, count is 5
.....In Child #1, count is 6
In Child #2, count is 6
In Child #3, count is 6
....In Child #1, count is 7
In Child #2, count is 7
In Child #3, count is 7
.....In Child #1, count is 8
In Child #2, count is 8
In Child #3, count is 8
....In Child #1, count is 9
Child #1 terminating.
In Child #2, count is 9
Child #2 terminating.
In Child #3, count is 9
Child #3 terminating.
Main thread ending.