split pdf pages using pdfsharp in csharp in csharp

main.cs
using PdfSharp.Pdf;
using PdfSharp.Pdf.IO;

public static void SplitPdf(string inputFilePath, int startPage, int endPage, string outputFilePath)
{
    // Load the input PDF document
    using (PdfDocument inputDocument = PdfReader.Open(inputFilePath, PdfDocumentOpenMode.Import))
    {
        // Create a new PDF document that will contain the extracted pages
        PdfDocument outputDocument = new PdfDocument();

        // Loop through the pages of the input PDF document
        for (int pageNumber = startPage; pageNumber <= endPage; pageNumber++)
        {
            // Get the page from the input document
            PdfPage page = inputDocument.Pages[pageNumber - 1];

            // Add the page to the output document
            outputDocument.AddPage(page);
        }

        // Save the extracted pages as a new PDF document
        outputDocument.Save(outputFilePath);
    }
}
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main.cs
string inputFilePath = "input.pdf";
int startPage = 1;
int endPage = 3;
string outputFilePath = "output.pdf";

SplitPdf(inputFilePath, startPage, endPage, outputFilePath);
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