Comparing folders and content with PowerShell

Question

I have two different folders with xml files. One folder (folder2) contains updated and new xml files compared to the other (folder1). I need to know which files in folder2 a

Answer 1

Handy version using script parameter

Simple file-level comparasion

Call it like PS > .\DirDiff.ps1 -a .\Old\ -b .\New\

Param(
  [string]$a,
  [string]$b
)

$fsa = Get-ChildItem -Recurse -path $a
$fsb = Get-ChildItem -Recurse -path $b
Compare-Object -Referenceobject $fsa -DifferenceObject $fsb

Possible output:

InputObject                  SideIndicator
-----------                  -------------
appsettings.Development.json <=
appsettings.Testing.json     <=
Server.pdb                   =>
ServerClientLibrary.pdb      =>