public IActionResult Convert()
{
    const string fileType = "application/pdf";
    const string fileName = "sample-xps.pdf";

    string dataDir = Path.Combine(_appEnvironment.WebRootPath, "samples");
    var xpsInputFile = Path.Combine(dataDir, "sample-new.xps");

    // Initialize XPS input stream
    using MemoryStream pdfStream = new();
    XpsDocument document = new(xpsInputFile);

    Aspose.Page.XPS.Presentation.Pdf.PdfSaveOptions options = new()
    {
        JpegQualityLevel = 100,
        ImageCompression = Aspose.Page.XPS.Presentation.Pdf.PdfImageCompression.Jpeg,
        TextCompression = Aspose.Page.XPS.Presentation.Pdf.PdfTextCompression.Flate
    };

    // Create rendering device for PDF format
    Aspose.Page.XPS.Presentation.Pdf.PdfDevice device = new(pdfStream);

    document.Save(device, options);
    return File(pdfStream, fileType, fileName);
}