How to use custom fonts for PDF creation in Azure function

private static Stream GetStreamFromUrl(string url)
        {
            byte[] fontData = null;
 
            using (var web = new System.Net.WebClient())
                fontData = web.DownloadData(url);
 
            return new MemoryStream(fontData);
        }

using Syncfusion.Pdf;
using Syncfusion.Pdf.Graphics;
using System.Net.Http.Headers;
using System.Net;
using System.Net.Http;
using Microsoft.Azure.WebJobs;

//Creating the PDF document
 
PdfDocument document = new PdfDocument();
 
//Adding the page
 
PdfPage page = document.Pages.Add();
 
//Read font stream from blob to create a PdfFont 
 
Stream fontStreamFromBlob = GetStreamFromUrl("https://pdfcustomfontsample20190.blob.core.windows.net/pdfcustomfontcontainer/Pacifico.ttf");
 
//Create PdfFont from the stream got from blob
 
PdfFont fontBlob = new PdfTrueTypeFont(fontStreamFromBlob, 24);
//Drawing the Unicode string
 
page.Graphics.DrawString("Hello PDF Sample - using font from Blob", fontBlob, PdfBrushes.Black, 50, 50);
 
//Read the font stream from physical path from azure function app directory
 
byte[] data = File.ReadAllBytes(Path.Combine(executionContext.FunctionAppDirectory, "Fonts", "Pacifico.ttf"));
 
Stream fontStream = new MemoryStream(data);
 
//Loading the custom TTF font
 
PdfFont font = new PdfTrueTypeFont(fontStream, 24);
 
//Drawing the Unicode string
 
page.Graphics.DrawString("Hello PDF Sample - using font from Path", font, PdfBrushes.Black, 50, 100);
 
MemoryStream ms = new MemoryStream();
 
document.Save(ms);
 
ms.Position = 0;
 
HttpResponseMessage response = new HttpResponseMessage(HttpStatusCode.OK);
 
response.Content = new ByteArrayContent(ms.ToArray());
 
response.Content.Headers.ContentDisposition = new ContentDispositionHeaderValue("attachment")
 
{
 
        FileName = "Sample.pdf"
 
};
 
response.Content.Headers.ContentType = new MediaTypeHeaderValue("application/pdf");
 
return response;