PDFManager.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace ConsoleApp1.PDF
{
    class PDFManager
    {

        public void CreatePDF(string fileName, string htmlString)
        {
            ByteArrayToFile(fileName, PdfSharpConvert(htmlString));
            Console.WriteLine("Created PDF: " + fileName);
        }

        private bool ByteArrayToFile(string fileName, byte[] byteArray)
        {
            try
            {
                using (var fs = new FileStream(fileName, FileMode.Create, FileAccess.Write))
                {
                    fs.Write(byteArray, 0, byteArray.Length);
                    return true;
                }
            }
            catch (Exception ex)
            {
                Console.WriteLine("Exception caught in process: {0}", ex);
                return false;
            }
        }

        private Byte[] PdfSharpConvert(String html)
        {
            Byte[] res = null;
            using (MemoryStream ms = new MemoryStream())
            {
                var pdf = TheArtOfDev.HtmlRenderer.PdfSharp.PdfGenerator.GeneratePdf(html, PdfSharp.PageSize.A4);
                pdf.Save(ms);
                res = ms.ToArray();
            }
            return res;
        }
    }
}