Application.Exit

[George_George]

Thanks PIEBALDconsult, I just want to confirm in console and Windows service application, we should not use Application.Exit to terminate the process, right? regards, George

[Luc Pattyn]

Hi George, 1. yes Environment.Exit() will clean up and avoid leaks. Everything that terminates a process will clean up the resources allocated by the process itself, that is basic functionality in Windows itself. Nevertheless, it is good practice to do it explicitly; and you should clean up if your program has two or more parts that are rather independent, so after part 1 you could and should clean up before starting part 2, so part 2 gets a maximum of available resources (memory, handles, whatever) and hence gets the best performance. 2.

George_George wrote:

finally blocks are executed)?

Why don't you try it? you really should replace some of your questions by looking it up yourself and/or testing it yourself. Here is enough code to figure it out (put it in e.g. a button click handler):

try {
Application.Exit();
} finally {
StreamWriter tw=File.CreateText("finally.txt");
tw.Close();
}

:)

Luc Pattyn [Forum Guidelines] [My Articles]

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[George_George]

Cool, Luc! Finally block is not executed. I think the reason is, process is terminated by Environment.Exit, and resources are released by Windows, so there is no need to execute finally block, right? regards, George

[Luc Pattyn]

Hi George,

George_George wrote:

Finally block is not executed

:confused::confused: It was executed in my experiment, with the code snippet in a button click handler, the file got generated in \bin\debug folder. :)

Luc Pattyn [Forum Guidelines] [My Articles]

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[George_George]

Hi Luc, can you post your code please? Finally block is not executed, here is my code.

using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication2
{
class Program
{

    static void Main(string\[\] args)
    {
        try
        {
            Environment.Exit(-1);
        }
        finally
        {
            Console.WriteLine("Hello world");
        }
    }
}

}

regards, George

[Luc Pattyn]

Hi George, you already have my code[^]. I am not surprised your code snippet is fooling you, after all you ask it to perform console I/O where the application is exiting, hence forms, consoles, and other UI stuff is winding down. The file system however remains alive to the very end of the app. :)

Luc Pattyn [Forum Guidelines] [My Articles]

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This month's tips: - before you ask a question here, search CodeProject, then Google; - the quality and detail of your question reflects on the effectiveness of the help you are likely to get; - use PRE tags to preserve formatting when showing multi-line code snippets.

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[George_George]

Sorry Luc, Here is your code, the finally blocked is not executed. Could you reproduce? I am confused. :-)

using System;
using System.IO;
using System.Collections.Generic;
using System.Linq;
using System.Text;

namespace ConsoleApplication2
{
class Program
{

    static void Main(string\[\] args)
    {
        try
        {
            Environment.Exit(-1);
        }
        finally
        {
            StreamWriter tw = File.CreateText("finally.txt");
            tw.Close();
        }
    }
}

}

regards, George

[Luc Pattyn]

Hi George, my example was on Application.Exit() which causes an Application.Run() to return, I guess asynchronously by sending a Windows message or something; so the thread has the opportunity to first execute the finally block. Your test was on Environment.Exit() which, from your observation, seems to cause an immediate exit. I trust the exact behavior is hidden somewhere in the documentation. :)

Luc Pattyn [Forum Guidelines] [My Articles]

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This month's tips: - before you ask a question here, search CodeProject, then Google; - the quality and detail of your question reflects on the effectiveness of the help you are likely to get; - use PRE tags to preserve formatting when showing multi-line code snippets.

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[George_George]

Thanks Luc, I think for console and Windows Service application, we should never use Application.Exit, right? regards, George

[Luc Pattyn]

Application.Exit() causes Application.Run() to return, both make sense in windows apps only. this has been asked and answered many times in the last couple of days, it is not going to change any time soon ... :)

Luc Pattyn [Forum Guidelines] [My Articles]

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This month's tips: - before you ask a question here, search CodeProject, then Google; - the quality and detail of your question reflects on the effectiveness of the help you are likely to get; - use PRE tags to preserve formatting when showing multi-line code snippets.

---

[George_George]

Thanks Luc, Question answered. regards, George