powershell_array

# use generic list to add objects in a performant way
$starTrekShowInfo = New-Object System.Collections.Generic.List[string]
$starTrekShowInfo.Add('Star Trek: The Next Generation')

# use custom objects for high performance adds of custom object
$choiceArray = New-Object System.Collections.Generic.List[PSCustomObject]
#------------------------------------------------------------------------------
#  old method which should no longer be used IAW:
# https://docs.microsoft.com/en-us/dotnet/api/system.collections.arraylist?view=net-6.0
# adding stuff to emtpy array objects quickly
$myarray = [System.Collections.ArrayList]::new()
[void]$myArray.Add('Value')
#------------------------------------------------------------------------------