Powershell csv remove lines - powershell

Question

I have a CSV file (file1) that looks like: (User dirs and the size)
Initials,Size
User1,10
User2,100
User3,131
User4,140
I have another CSV file (file2) that looks like: (VIP users)
User2
User4
Now what I'm trying to do, is to update file1, so it looks like:
User1,10
User3,131
User2 and User4 is removed because they are in file2
I can get them removed, but at the same time I remove the size for all users, so my output is only the Users:
User1
User3
My code:
$SourcePath = "\\server1\info\SYSINFO\UsrSize"
$DestinationFile = "\\server1\info\SYSINFO\UsrSize\OverLimit\UsersOverLimit1.log"
$VIP_Exclusion_List = "\\server1\info\SYSINFO\UsrSize\OverLimit\_VIP_EXCLUSION_LIST.txt"
$Database = "\\server1\info\SYSINFO\UsrSize\OverLimit\_UsersOverLimitDATABASE.log"
$INT_SizeToLookFor = 100
dir $SourcePath -Filter usr*.txt | import-csv -delimiter "`t" |
Where-Object {[INT] $_."Size excl. Backup/Pst" -ge $INT_SizeToLookFor} |
Select-Object Initials,"Size excl. Backup/Pst" | convertto-csv -NoTypeInformation | % { $_ -replace '"', ""} | out-file $DestinationFile ;
$Userlist = import-csv $DestinationFile | Select-Object Initials |
convertto-csv -NoTypeInformation | % { $_ -replace '"', ""};
compare-object ($Userlist) (get-content $VIP_Exclusion_List) |
select-object inputObject | convertto-csv -NoTypeInformation |
% { $_ -replace '"', ""} | out-file "\\server1\info\SYSINFO\UsrSize\OverLimit\UsersOverLimitThisTime.log";

Answer 1

If the files are small-ish and you don't care too much about performance, then the following would be a trivial way:
$data = Import-Csv file1
$vips = Import-Csv file2
$data = $data | ?{ $vips -notcontains $_.Initials }
$data | Export-Csv file1_new -NoTypeInformation
A faster way would be to add the names to remove to a set, but given the things you're talking about here I doubt you'll get into the range of a few thousand or million users.

Answer 2

I solved it using this code:
$ArrayVIP = get-content $VIP_Exclusion_List
select-string $DestinationFile -pattern $ArrayVIP -notmatch |
select -expand line |
out-file $DestinationFile
Taken from here: Removing lines from a CSV