Arrays & Loops in PowerShell

How do I modify the following script to use Arrays and Loops?

I would like the search folders to be in an array.  Then I can just loop through the array.

$compareDate = (Get-Date).AddDays(-14)
$temp = Get-ChildItem "c:\vbapps\ASP.NET_Apps\" -Recurse| Where-Object { $_.LastWriteTime -ge $compareDate } | Select FullName
$result = $temp
$temp = Get-ChildItem "c:\vbapps\WinForms_Apps\" -Recurse| Where-Object { $_.LastWriteTime -ge $compareDate } | Select FullName
$result = $temp + $result
$result