Recursively get all groups an active directory user or group is a part of

Get-ADMembershipRecursive.ps1

function Get-ADMembershipRecursive($name){
    $names = [System.Collections.ArrayList]@()
    Get-ADPrincipalGroupMembership -Identity $name | ForEach-Object {
        $names.Add($_.Name) | Out-Null
        Get-MembershipRecursive -name $_ | ForEach-Object { 
            $names.Add($_) | Out-Null
        }
    }
    return $names
}