Merge PDFs with PowerShell

Merge-PDF.ps1

#Not my code, this is from Mike Pfeiffer - http://mikepfeiffer.net/2010/03/how-to-merge-pdf-files-using-powershell-and-pdfsharp/
#Requires PDFSharp assembly libraries http://sourceforge.net/projects/pdfsharp/
#You need to load the assembly before you can use the function            
#
#Merge-PDF -path c:\pdf_docs -filename c:\saved_docs.pdf


Add-Type -Path C:\assemblies\PdfSharp.dll                        
            
Function Merge-PDF {            
    Param($path, $filename)                        
            
    $output = New-Object PdfSharp.Pdf.PdfDocument            
    $PdfReader = [PdfSharp.Pdf.IO.PdfReader]            
    $PdfDocumentOpenMode = [PdfSharp.Pdf.IO.PdfDocumentOpenMode]                        
            
    foreach($i in (gci $path *.pdf -Recurse)) {            
        $input = New-Object PdfSharp.Pdf.PdfDocument            
        $input = $PdfReader::Open($i.fullname, $PdfDocumentOpenMode::Import)            
        $input.Pages | %{$output.AddPage($_)}            
    }                        
            
    $output.Save($filename)            
}