Log file monitoring on local file system, export modifications in CSV format

Filemon.ps1

<#
.Synopsis
Original file taken from https://gallery.technet.microsoft.com/scriptcenter/Powershell-FileSystemWatche-dfd7084b
Adapted for monitoring visual studio debug crashes with delimited log files creation/modification

.Description
This script monitors only log files created or modified on a specified directory
and creates the corresponding csv output per changed file content
NOTE: Default target dir is C:\%APPDATA%\

.Parameter unloadwatcher
Add or remove the relevant filesystem event watchers used for monitoring

.Example
PS:\> .\Filemon.ps1
Please enter your selection [L - Load Watchers] [U - Unload Watchers]: L

Id     Name            PSJobTypeName   State         HasMoreData     Location             Command
--     ----            -------------   -----         -----------     --------             -------
1      FileCreated                     NotStarted    False                                ...
2      FileChanged                     NotStarted    False                                ...

PS:\> The file 'testlog23.log' was Changed at 12/20/2018 15:36:53
The file 'testlog23.log' was Changed at 12/20/2018 15:36:53
PS:\> The file 'filen2 - Copy.log' was Created at 12/20/2018 15:37:28
The file 'filen2 - Copy.log' was Changed at 12/20/2018 15:37:28

#>
Function monitor-files {
param([Parameter(Mandatory=$false)]
[switch]$unloadwatcher
)

if ($unloadwatcher) {
# To stop the monitoring, run the following commands:
Unregister-Event FileCreated
Unregister-Event FileChanged
break;continue;
}
$folder = "$env:APPDATA\"; $filter = "*.log"
if ( -not(Test-Path -PathType Leaf ".\output1.csv") ) { 
Set-Content -Path "$env:APPDATA\output1.csv" -Value "TimeCreated|ComputerName|Problem|Empty|Class|FileName|ExceptionType|ExceptionMsg|StackTrace|LOC"
}
$fsw = New-Object IO.FileSystemWatcher $folder,$filter -Property @{IncludeSubdirectories = $false;NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite'}

Register-ObjectEvent $fsw Created -SourceIdentifier FileCreated -Action {
$name = $Event.SourceEventArgs.Name
$changeType = $Event.SourceEventArgs.ChangeType
$timeStamp = $Event.TimeGenerated
Write-Host "The file '$name' was $changeType at $timeStamp" -fore green
}

Register-ObjectEvent $fsw Changed -SourceIdentifier FileChanged -Action {
$name = $Event.SourceEventArgs.Name
$changeType = $Event.SourceEventArgs.ChangeType
$timeStamp = $Event.TimeGenerated
Write-Host "The file '$name' was $changeType at $timeStamp" -fore white
$contchanged = (Get-Content -Path "$env:APPDATA\User.log" | Select -Last 1)
Add-Content -Value $contchanged -Path "$env:APPDATA\output1.csv"
 }
}
$sel = Read-Host -Prompt "Please enter your selection [L - Load Watchers] [U - Unload Watchers]";
if ($sel.toUpper() -eq 'L') {
monitor-files
}else {
monitor-files -unloadwatcher
}