用于 .NET 的 PDF API，用于处理、编辑和准确转换 PDF 文档

PM> Install-Package Aspose.PDF

public static void ConvertPDFtoWord()
{
    // Open the source PDF document
    Document pdfDocument = new Document(_dataDir + "PDFToDOC.pdf");
    // Save the file into MS document format
    pdfDocument.Save(_dataDir + "PDFToDOC_out.doc", SaveFormat.Doc);
}

// The path to the documents directory.
string dataDir = RunExamples.GetDataDir_AsposePdf_Pages();
// Open first document
Document pdfDocument1 = new Document(dataDir + "Concat1.pdf");
// Open second document
Document pdfDocument2 = new Document(dataDir + "Concat2.pdf");
// Add pages of second document to the first
pdfDocument1.Pages.Add(pdfDocument2.Pages);
dataDir = dataDir + "ConcatenatePdfFiles_out.pdf";
// Save concatenated output file
pdfDocument1.Save(dataDir);