Powershell get-members of $EventArgs automatic variable - powershell

Question

I want to list all available properties of the variable $EventArgs by piping it to get-member. but I am having trouble to get the members of the automatic variable $EventArgs.
In the example I can see that they get the property. FullPath from the automatic variable $EventArgs. I want a way to list all the properties that maybe are useful.
Any ideas of how to get the members of $EventArgs automatic variable.
$watcher = New-Object System.IO.FileSystemWatcher
$watcher.Path = "C:\"
$watcher.IncludeSubdirectories = $true
$watcher.EnableRaisingEvents = $true
$watcher.Site
$arrary = #()
$watcher.Filter = ""
Register-ObjectEvent $watcher "Created" -Action {
write-host "Created: $($eventArgs.FullPath)"
$arrary+= $EventArgs|gm
$arrary+= $EventArgs
write-host $EventArgs|gm
$EventArgs|gm
}

Answer 1

One quick way to see all of the properties (there are only three) is to do this:
Register-ObjectEvent $watcher "Created" -Action {
$eventArgs | Select-Object * | Write-Host
}
However, you'll get much more useful information if you do this:
Register-ObjectEvent $watcher "Created" -Action {
Write-Host $eventArgs.GetType()
}
and then look up the resultant type on MSDN. When you do that, you'll see that $EventArgs is actually an object of type System.IO.FileSystemEventArgs, which is fully documented here. Not only will you see the three properties, you'll see what they mean. For example, the first property ChangeType is really an enumeration of the type System.IO.WatcherFileTypes, and you can learn all of the different values it can have.