取消注册所有自定义对象事件

我想在所有取消注册任何自定义Register-ObjectEvent的代码之前运行命令;有些命令与对象事件的Remove-Jobs *类似。我想这样做，因为如果我尝试两次注册$watcher，它会引发错误。有没有叫Get-ObjectEvent命令，否则我就不会问这个取消注册所有自定义对象事件

$folder = "C:\some\path\to\folder" 

# File it is watching 
$filter = "flag.txt" 

# Instantiate Watcher 
$Watcher = New-Object IO.FileSystemWatcher $folder, $filter -Property @{ 
    IncludeSubdirectories = $false 
    NotifyFilter = [IO.NotifyFilters]'FileName, LastWrite' 
} 

# EVENT: $filter is created 
$onCreated = Register-ObjectEvent $Watcher Created -SourceIdentifier FileCreated -Action { 
    $path = $Event.SourceEventArgs.FullPath 
    $name = $Event.SourceEventArgs.Name 
    $changeType = $Event.SourceEventArgs.ChangeType 
    $timeStamp = $Event.TimeGenerated 
    Write-Host "The file '$name' was $changeType at $timeStamp" 
    Write-Host $path 
}

来源

2017-07-24 Kolob Canyon