Render XSL-FO File Format to PDF in C#. The steps to achieve this conversion are elaborated here: https://kb.conholdate.com/total/net/how-to-render-xsl-fo-to-pdf-in-c-sharp/

how-to-render-xsl-fo-to-pdf-in-c-sharp.cs

using System;
//Add reference to Aspose.PDF for .NET API
//Use the following namespace to render XSL-FO file format to PDF format
using Aspose.Pdf;

namespace RenderXSLFOToPDF
{
    class Program
    {
        static void Main(string[] args)
        {
            //Set license before rendering XSL-FO file type to PDF file
            Aspose.Pdf.License AsposePDFLicense = new Aspose.Pdf.License();
            AsposePDFLicense.SetLicense(@"c:\asposelicense\license.lic");

            //Load XSL-Fo file using XSL Fo load options
            Document InputXSLFODocument = new Document("InputXSLFODocument.fo", new XslFoLoadOptions());
            //Save the PDF file converted from XSL-FO document 
            InputXSLFODocument.Save("OutputPDFConvertedFromXSLFOFile.pdf");
        }
    }
}