Building a custom object in powershell (Add-Member) - powershell

Question

Trying to build a custom object inside a For-EachObject loop.
Here is the code
$infouser = New-Object -TypeName psobject
(Get-ChildItem -Path "\\$poste\C$\Users").Name | ForEach-Object {
$nomcomplet += Get-ADUser -Identity $_ | select-object -ExpandProperty userprincipalname
Add-Member -InputObject $infouser -Name "Code" -Value $_ -MemberType NoteProperty
Add-Member -InputObject $infouser -Name "Nom complet" -Value $nomcomplet -MemberType NoteProperty
}
$infouser | Out-GridView
What i'm trying to achieve is a custom object containing the usernames in C:\USERS along with their equivalent full e-mail adress from the AD.
What I have works partially, it displays the first one it can add, but it doesn't "append" the others :
Giving the error : "Add-Member : Cannot add a member with the name...because a member with that name already exists. If you want to overwrite the member anyway, use the Force parameter to overwrite it."
I don't want to overwrite, I want to append it to the object so the final object contains all usernames and all adresses.
What am I doing wrong here? Thanks

Answer 1

You need to create an array of psobjects, not a single psobject. You're creating a single object and re-adding the properties X times.
This implicitly creates an array and adds a new psobject for each loop.
$infouser = (Get-ChildItem -Path "\\$poste\C$\Users").Name | ForEach-Object {
[pscustomobject]#{
'Code' = $_
'Nom Complet' = $(Get-ADUser -Identity $_ | select-object -ExpandProperty userprincipalname )
}
}
$infouser | Out-GridView