注销所有自定义对象事件

我想在所有这些代码之前运行一个命令来注销任何自定义 Register-ObjectEvent ; 一些命令类似于 Remove-Jobs * 对于对象事件。我想这样做,因为如果我尝试注册,它会抛出一个错误 $watcher Get-ObjectEvent 否则我不会问这个

$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
}