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.net - Adding an attachment to email using C#

I'm using the following code from this answer Sending email in .NET through Gmail. The trouble I'm having is adding an attachment to the email. How would I add an attachment using the code below?

using System.Net.Mail;

var fromAddress = new MailAddress("from@gmail.com", "From Name");
var toAddress = new MailAddress("to@example.com", "To Name");
const string fromPassword = "fromPassword";
const string subject = "Subject";
const string body = "Body";

var smtp = new SmtpClient
{
    Host = "smtp.gmail.com",
    Port = 587,
    EnableSsl = true,
    DeliveryMethod = SmtpDeliveryMethod.Network,
    UseDefaultCredentials = false,
    Credentials = new NetworkCredential(fromAddress.Address, fromPassword)
};
using (var message = new MailMessage(fromAddress, toAddress)
    {
        Subject = subject,
        Body = body
    })
{
    smtp.Send(message);
}

Thanks in advance.

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The message object created from your new MailMessage method call has a property .Attachments.

For example:

message.Attachments.Add(new Attachment(PathToAttachment));

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