Run code on powershell script termination to close files?

Might try using Try/Catch/Finally, putting your close() commands in the Finally block.

With PowerShell 2.0 and up, you can define a Trap which will fire when a terminating error occurs. You can define multiple traps to capture different exceptions. This could result in much cleaner code than try/catch littered everywhere, or wrapping the entire script in one big try/catch.

To terminate a script, use exit .If an exception is thrown, use try/catch/finally with close() commands in finally. If it's just an if-test, try something like this:

function Close-Script {    #If stream1 is created    if($stream1) {         $stream1.Close()    }    #Terminate script    exit}$stream1 = New-Object System.IO.StreamWriter filename.txtIf(a test that detects your error) {    Close-Script}

If the amounts of streamwriters varies from time to time, you can collect them to an array and close them. Ex:

function Close-Script {    #Close streams    $writers | % { $_.Close() }    #Terminate script    exit}$writers = @()$stream1 = New-Object System.IO.StreamWriter filename.txt$writers += $stream1$stream2 = New-Object System.IO.StreamWriter filename2.txt$writers += $stream2If(a test that detects your error) {    Close-Script}