var dir = Environment.GetFolderPath(Environment.SpecialFolder.MyDocuments);
        var file = Path.Combine(dir, "Example.pdf");

        using (var converter = new Pdf2ImageConverter(file))
        {
            var bitmaps = converter.SelectOutputType(eOutputType.bmp16m)
                                   .SelectPageRange(30, 35)
                                   .SelectResolution(eResolution.Medium)
                                   .GetBitmaps();

            converter.SelectOutputType(eOutputType.png16)
                     .SelectPageRange(1, 5)
                     .SelectResolution(eResolution.Standart)
                     .SelectOutputPath(Environment.GetFolderPath(Environment.SpecialFolder.MyPictures))
                     .SaveAsFiles();

        }