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Does anyone know how to get the return code from a .NET executable? I've written a program that has a static main method that returns an int and I can't seem to get this number when I run it from powershell. This is what I currently have:

&$executable $params
exit $LASTEXITCODE

where $executable is the path to the executable and $params are the parameters passed to the executable.

However, $LASTEXITCODE is always 0. The program writes to the console via a Log4Net console appender so the above pipes the output to the console in PowerShell.

Can anyone help?

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  • 1
    There's nothing wrong with your PowerShell code. Please show the code of your .Net program. Commented Sep 8, 2017 at 15:20
  • I'm doing Environment.Exit(1) at the end of my static void Main() method Commented Sep 8, 2017 at 15:52

2 Answers 2

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(Start-Process -FilePath 'exe' -ArgumentList @() -PassThru -Wait).ExitCode

This will grab your exit code after execution completes. You could even assign it to a variable and access the process members if you want.

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4 Comments

Nope this didn't work. Exit code that comes back is still 0. My program is definitely setting the error code to 1 so I'm not sure why it always comes back at 0
@BigBytes If it's not capturing your exit code, your program apparently isn't returning non-zero.
(Start-Process -FilePath 'exe' -ArgumentList @() -PassThru -Wait).ExitCode did the trick
@BigBytes The ArgumentList is where an array of arguments would go, for example: $Params
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Sounds to me like your executable doesn't return an exit code (i.e., Environment.Exit()) but instead outputs a result code (e.g., Console.Write()).

Try something like:

$ReturnValue = &$executable $params
Exit $ReturnValue
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5 Comments

The executable has a static main method which returns an int which I assumed would be the equivalent of an exit code but maybe I need to try Enivronment.Exit() with an exit code. There is no Console.Write(). I will try what you suggested though and let you know if it works.
@BigBytes You may want to take a look at this question. TLDR is either Environment.Exit(value) or return value should work.
Doesn't work. I'm trying Environment.Exit(1) and using:- &$executable $params Exit $LastExitCode But this doesn't work. It still thinks the return code is 0. What am I doing wrong?
$ReturnValue = &$executable $params Exit $ReturnValue doesn't work either
@BigBytes Hm. I've not seen that. Try running it using one of the methods in this answer.

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