Work with images in PDF in .NET SDK

    public async Task AddImage()
    {
        const string localPdfDocument = @"C:\Samples\sample.pdf";
        const string localFolder = @"C:\Samples";
        const string storageTempFolder = "TempPdfCloud";
        const string storageFileName = "sample.pdf";
        const string localImageFile = @"C:\Samples\sample.jpg";
        const string storageImageFile = "sample.jpg";
        const string resultFileName = "output_sample_images_add.pdf";
        const int pageNumber = 1;

        // Get your AppSid and AppSecret from https://dashboard.aspose.cloud (free registration required). 
        pdfApi = new PdfApi(AppSecret, AppSid);

        using var file = File.OpenRead(localPdfDocument);
        await pdfApi.UploadFileAsync(Path.Combine(storageTempFolder, storageFileName), file);

        using var imageFile = File.OpenRead(localImageFile);
        await pdfApi.UploadFileAsync(Path.Combine(storageTempFolder, storageImageFile), imageFile);

        double llx = 10;
        double lly = 10;
        double urx = 100;
        double ury = 100;

        AsposeResponse response = await pdfApi.PostInsertImageAsync(storageFileName,
                pageNumber, 
                llx, lly, urx, ury,
                Path.Combine(storageTempFolder, storageImageFile),
                folder: storageTempFolder);

        if (response == null)
            Console.WriteLine("AddImage(): Unexpected error!");
        else if (response.Code < 200 || response.Code > 299)
            Console.WriteLine("AddImage(): Failed to insert image in the document.");
        else
        {
            await( await pdfApi.DownloadFileAsync(Path.Combine(storageTempFolder, storageFileName)))
                .CopyToAsync(File.Create(Path.Combine(localFolder, resultFileName)));

            Console.WriteLine("AddImage(): image '{0}' successfully inserted in the document '{1}.", storageImageFile, resultFileName);
        }
    }