Adds header for every file in a list with powershell

Add-Header.ps1

# Check encoding!
function Add-Header ($file, $firstLine) {
begin {
  $content = Get-Content -Encoding Oem -Path $file | Out-String
  }
process {
  }
end {
  "$firstLine`r`n$content" | Set-Content -Encoding Oem -Path $file
  }
}

$i=0
Get-Content .\file-list.txt | # Select-Object -first 3 |
ForEach-Object {
  Add-Header $_ "// __header text __"
  Write-Host $("{0}. ready : {1}" -f $global:i++, $_)
}