powershell - Remove all variables

Question

I want to remove all user-created variables at the start of a script.

Currently I am doing Remove-Variable -Name * but it tries to dele

Answer 1

Invoke a new instance of PowerShell, get the built-in variables, then remove everything else that doesn't belong.

$ps = [PowerShell]::Create()
$ps.AddScript('Get-Variable | Select-Object -ExpandProperty Name') | Out-Null
$builtIn = $ps.Invoke()
$ps.Dispose()
$builtIn += "profile","psISE","psUnsupportedConsoleApplications" # keep some ISE-specific stuff

Remove-Variable (Get-Variable | Select-Object -ExpandProperty Name | Where-Object {$builtIn -NotContains $_})