Catching exception on environment.exit

Question

Hi,

I need to return an exit code of 1 after my Main functions ends. However I have an other thread that never ends (while(true)). So I managed to call Environment.Exit(1). But I got some exception when diposing com objects...

For several reasons I can't change the other thread code. What do you guys advocate to do ?

May I catch the exception coming from the com object disposing ? Do I have an other option for returning an exit code ?

Thx

Answer 1

Try using:

Environment.ExitCode = 1;

However; if the other thread is not a background thread, you will need it to exit in order to end the process (the exit code is meaningless until the process exits).

Answer 2

I suggest you to: attach to ProcessExit event to do any last chance cleanup or... do a Thread.Abort on the thread to allow it to finish before exit.

AppDomain.CurrentDomain.ProcessExit +=
delegate(object sender, EventArgs e)
{
 Console.WriteLine("Process Exit");
};
Thread t1 = new Thread(new ThreadStart(delegate
{
try
{
 while (true)
 {
  Console.WriteLine("test 1");
  Thread.Sleep(500);
 }
}
finally
{
 Console.WriteLine("Terminating t1");
}
}));

Thread t2 = new Thread(new ThreadStart(delegate
{
try
{
 while (true)
 {
  Console.WriteLine("test 2");
  Thread.Sleep(500);
 }
}
finally
{
 Console.WriteLine("Terminating t2");
}
}));

t1.Start();
t2.Start();
Thread.Sleep(2000);
t2.Abort();
t2.Join();
Environment.Exit(1);

Answer 3

In fact, to be more precise, I got the folowing on my output:

• first,I got the following error (on my main thread) catched during the disposal of my com object : "System.ArgumentNullException: Value cannot be null. Parameter name : obj at System.GC.SuppressFinalize(Object obj) at ...."
• then I got the call of the AppDOmain.CurrentDomain.ProcessExit callback.
• and finally this unctached error: Unhandled Exception: System.ArgumentNullException: Value cannot be nul. Parameter namer: obj at System.GC.SuppressFinalize(Object obj) at ....

This is the second error that set my exit code not to 0. I don't know if this error occured on my main thread or not. Do i have a way to catch all the uncatched exception coming from others thread ? Or a way to prevent my exit code not being 0 ?

Answer 4

you can kill proccess by writting this code Dim myProcess As System.Diagnostics.Process = System.Diagnostics.Process.GetCurrentProcess() myProcess.Kill()

or Environment.exit(1) is best method for kill all processes

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