How to generate and send a PDF document as attachment in an email using .Net Core C#?

using Syncfusion.Pdf;
using Syncfusion.Pdf.Parsing;

Imports Syncfusion.Pdf
Imports Syncfusion.Pdf.Parsing

// Create a new instance of PdfDocument class.
 PdfDocument document = new PdfDocument();
// Add a page to the document.
PdfPage page = document.Pages.Add();
// Create PDF graphics for the page.
PdfGraphics g = page.Graphics;
// Create a solid brush
PdfBrush brush = new PdfSolidBrush(Color.Black);
// Set the font.
PdfFont font = new PdfStandardFont(PdfFontFamily.Helvetica, 20f);
// Draw the text.
g.DrawString("Hello world!", font, brush, new PointF(20, 20));
MemoryStream ms = new MemoryStream();
// Save and close the document.
document.Save(ms);
document.Close(true);
//Reset the memory stream position.  
ms.Position = 0;
Attachment file = new Attachment(ms, "PdfAttachment.pdf", "application/pdf");
//Sends the email message
//Update the required e-mail id here
SendEMail("user1@outlook.com", "user2@outlook.com", "Essential PDF document", "Create PDF MailBody", file);

Private Sub SurroundingSub()
‘Create a new instance of PdfDocument class.
 Dim document As PdfDocument = New PdfDocument()
‘Add a page to the document.
Dim page As PdfPage = document.Pages.Add()
‘Create PDF graphics for the page.
Dim g As PdfGraphics = page.Graphics
‘Create a solid brush
Dim brush As PdfBrush = New PdfSolidBrush(Color.Black)
‘Set the font.
Dim font As PdfFont = New PdfStandardFont(PdfFontFamily.Helvetica, 20F)
‘Draw the text.
g.DrawString("Hello world!", font, brush, new PointF(20, 20))
 Dim ms As MemoryStream = New MemoryStream()
‘Save and close the document.
document.Save(ms)
document.Close(True)
ms.Position = 0
Dim file As Attachment = New Attachment(ms, "PdfAttachment.pdf", "application/pdf")
SendEMail("MailId@outlook.com", "RecipientMailId@outlook.com", "Essential PDF generated Pdf document", mailBody, docStream)
End Sub

private static void SendEMail(string from, string recipients, string subject, string body, Attachment attachment)
{
//Creates the email message
MailMessage emailMessage = new MailMessage(from, recipients);
//Adds the subject for email
emailMessage.Subject = subject;
//Sets the HTML string as email body
emailMessage.IsBodyHtml = false;
emailMessage.Body = body;
//Add the file attachment to this e-mail message.
emailMessage.Attachments.Add(attachment);
//Sends the email with prepared message
using (SmtpClient client = new SmtpClient())
{
//Update your SMTP Server address here
client.Host = "smtp.Live.com";
client.UseDefaultCredentials = false;
//Update your email credentials here
client.Credentials = new System.Net.NetworkCredential(from, "password");
client.Port = 587;
client.EnableSsl = true;
}         
}

Private Sub SendEMail(ByVal from As String, ByVal recipients As String, ByVal subject As String, ByVal body As String, ByVal docStream As MemoryStream)
'Creates the email message
Dim emailMessage As MailMessage = New MailMessage(from, recipients)
'Adds the subject for email
emailMessage.Subject = subject
'Sets the HTML string as email body
emailMessage.IsBodyHtml = True
emailMessage.Body = body
'Add the file attachment to this e-mail message.
emailMessage.Attachments.Add(New Attachment(docStream, "Sample.docx"))
'Sends the email with prepared message
Using client As SmtpClient = New SmtpClient
'Update your SMTP Server address here
client.Host = "smtp.outlook.com"
client.UseDefaultCredentials = False
'Update your email credentials here
client.Credentials = New System.Net.NetworkCredential(from, "password")
client.Port = 587
client.EnableSsl = True
client.Send(emailMessage)
End Using
End Sub