C#/VB.NET : extraire des images d'un PDF

PM> Install-Package Spire.PDF

using Spire.Pdf;
    using System.Drawing;
    
    namespace ExtractImages
    {
        class Program
        {
            static void Main(string[] args)
            {
                //Create a PdfDocument instance
                PdfDocument pdf = new PdfDocument();
                //Load a PDF document
                pdf.LoadFromFile("Input.pdf");
    
                int i = 1;
                //Loop through all pages in the document
                foreach (PdfPageBase page in pdf.Pages)
                {
                    //Extract images from each page and save them to a specified file path
                    foreach (Image image in page.ExtractImages())
                    {
                        image.Save(@"C:/Users/Administrator/Desktop/Images/" + "image" + i + ".png", System.Drawing.Imaging.ImageFormat.Png);
                        i++;
                    }
                }
            }
        }
    }

Imports Spire.Pdf
    
    Namespace ExtractImages
        Friend Class Program
            Private Shared Sub Main(ByVal args As String())
                'Create a PdfDocument instance
                Dim pdf As PdfDocument = New PdfDocument()
                'Load a PDF document
                pdf.LoadFromFile("Input.pdf")
    
                Dim i = 1
                'Loop through all pages in the document
                For Each page As PdfPageBase In pdf.Pages
                    'Extract images from each page and save them to a specified file path
                    For Each image As Image In page.ExtractImages()
                        image.Save("C:/Users/Administrator/Desktop/Images/" & "image" & i & ".png", Drawing.Imaging.ImageFormat.Png)
                        i += 1
                    Next
                Next
            End Sub
        End Class
    End Namespace