function CompareFileContents([string]$filepath1, [string]$filepath2, [string] $logFile)
{
write-output “Comparing $filepath1 to $filepath2″ | out-file $logFile -append
Compare-Object -referenceObject $(Get-Content $filepath1) -differenceObject $(Get-Content $filepath2) -syncWindow 0 | out-file $logFile -append
}

$date = Get-Date
$configDiffLogFile = “D:\builds\ConfigFileCompare{0}{1:d2}{2:d2}-{3:d2}{4:d2}.txt” -f $date.year,$date.month,$date.day,$date.hour,$date.minute
write-output “The config file diff output will be stored at $configDiffLogFile”

CompareFileContents \\qapapp01\e$\SAJServices\ReleaseStage\PriorRelease\svc\SnagAJob\SAJ.EmployerSearch\SnagAJob.EmployerSearch.WinHost.exe.config \\qapapp01\e$\SAJServices\ReleaseStage\ReleaseToDeploy\svc\SnagAJob\SAJ.EmployerSearch\SnagAJob.EmployerSearch.WinHost.exe.config $configDiffLogFile

Couple of items on the script:

1. The “-syncWindow 0″option ensures that each lines match sequentially. So if someone moves a line further down in the difference file, even though it has a match in the reference file, the change will be logged.
2. The filename format came from this post about a nifty way to use the -f format operator