Editing a MultiString Array for a registry value in Powershell

Question

How do I create a new MultiString Array and pass it to the registry remotely using Powershell 2.0? ``` #get the MultiLine String Array from the registry $regArry = (Get-Itemproperty "hklm:\System\CurrentControlSet\Control\LSA" -name "Notification Packages").("Notification Packages") #Create a new String Array [String[]]$tempArry = @() #Create an ArrayList from the Registry Array so I can edit it $tempArryList = New-Object System.Collections.Arraylist(,$regArry) # remove an entry from the list if ( $tempArryList -contains "EnPasFlt" ) { $tempArryList.Remove("EnPasFlt") } # Add an entry if ( !($tempArryList -contains "EnPasFltV2x64")) { $tempArryList.Add("EnPasFltV2x64") } # Convert the list back to a multi-line Array It is NOT creating new Lines!!! foreach($i in $tempArryList) {$tempArry += $1 = "
"]} # Remove the old Array from the Registry (Remove-ItemProperty "hklm:\System\CurrentControlSet\Control\Lsa" -name "notification packages").("Notification Packages") # Add the new one Ne…

Accepted Answer

There's no need for fiddling around with `ArrayList` and linebreaks. Particularly if you want to modify a remote registry. Simply use the `Microsoft.Win32.RegistryKey` class:

```
$server = '...'

$subkey = 'SYSTEM\CurrentControlSet\Control\LSA'
$value  = 'Notification Packages'

$reg = [Microsoft.Win32.RegistryKey]::OpenRemoteBaseKey('LocalMachine', $server)
$key = $reg.OpenSubKey($subkey, $true)
$arr = $key.GetValue($value)

$arr = @($arr | ? { $_ -ne 'EnPasFlt' })
if ($arr -notcontains 'EnPasFltV2x64') {
  $arr += 'EnPasFltV2x64'
}

$key.SetValue($value, [string[]]$arr, 'MultiString')
```

Editing a MultiString Array for a registry value in Powershell

Solution

Problem