using Aspose.Imaging;
using Aspose.Imaging.ImageOptions;
using System.IO;

string templatesFolder = @"c:\Users\USER\Downloads\templates\";
string dataDir = templatesFolder;

using (Aspose.Imaging.FileFormats.Webp.WebPImage image =
          (Aspose.Imaging.FileFormats.Webp.WebPImage)Image.Load(dataDir + "template.webp"))
{
    Aspose.Imaging.ImageOptions.PdfOptions options = new PdfOptions();
    options.PdfDocumentInfo = new Aspose.Imaging.FileFormats.Pdf.PdfDocumentInfo();

    image.Save(dataDir + "result.pdf", options);
}

File.Delete(dataDir + "result.pdf");