Append same string to all variables in column of CSV in powershell - powershell

Question

I would like help on how to add string -Config to each name in column Name.
CSV file contains:
FullName Name LastWriteTime
\\remotecomputer\ Henry 4/30/2020 3:44:57 PM
\\remotecompter\ Magy 12/7/2020 9:04:28 PM
The desired output:
FullName Name LastWriteTime
\\remotecomputer\ Henry-Config 4/30/2020 3:44:57 PM
\\remotecompter\ Magy-Config 12/7/2020 9:04:28 PM
My current code:
$InvoiceList = Import-CSV -Path C:\$source-PREP.csv | foreach($list in $InvoiceList){
$Name=$($list.name)
Get-ChildItem -Path 'C:\Names' -Filter *.txt | where {$_.Name -like '*' }|Copy-Item -Destination 'c:\newfolder' -Force }

Answer 1

Since your file has only a few known columns, you could use Select-Object and append -Config to the values in the Name column using a calculated property:
$data = Import-CSV -Path "C:\$source-PREP.csv" |
Select-Object FullName, #{Name = 'Name'; Expression = {'{0}-Config' -f $_.Name}}, LastWriteTime
$data | Export-Csv -Path "C:\$source-PREP.csv" -NoTypeInformation -Force
Result
FullName Name LastWriteTime
-------- ---- -------------
\\remotecomputer\ Henry-Config 4/30/2020 3:44:57
\\remotecompter\ Magy-Config 12/7/2020 9:04:28

Answer 2

You just need to iterate of each line in the CSV and update the name property. Once done export back out to CSV
$csvfile = 'some\path\to\file.csv'
$csvdata = Import-Csv $csvfile
$csvdata | ForEach-Object {$_.name = $_.name + '-Config'}
$csvdata | Export-Csv $csvfile -NoTypeInformation