Array List - Example Fetching Mailbox Permission

Declare Array List

Method 1:
[System.Collections.ArrayList]$ArrayList = @() 

Method 2:
$ArrayList = [System.Collections.ArrayList]@() 

Method 3:
$ArrayList = [System.Collections.ArrayList]::new() 

Method 4:
$ArrayList = New-Object System.Collections.ArrayList($Null) 

Method 5:
$ArrayList = New-Object System.Collections.ArrayList(,(1..10)) 

Method 6:
$ArrayList = New-Object System.Collections.ArrayList


Mailbox Permission

$upn = (Get-Mailbox -RecipientTypeDetails usermailbox)

$out = $null
$out=[System.Collections.ArrayList]@()
Foreach($u in $UPN)
{
    $data = Get-MailboxPermission $u.userprincipalname |select User,AccessRights

    @($data).ForEach({
    $property= [ordered]@{
    'DisplayName' = $u.DisplayName
    'AccessRights' = $_.AccessRights
    'User' = $_.User
    }
    $obj = New-Object psobject -Property $property

#Adding values to Array List
    $out.Add($obj)
    })
}
$out