Email with attachment

Sending an email from .NET application is fairly easy. There is System.Net.Mail namespace that provides all necessary tools. Here is an example how to send complete HTML formatted email with an attachment to number of people and also carbon-copy (cc) some others.

using System.Net.Mail;

First, we need a SmtpClient and give it address of actual server. If there is more authentication, there will be more work, but at my work you can just point it to the address.

string smtpAddress = "smtp.work.com";
SmtpClient smtpClient = new(smtpAddress);

Then we need to put together a MailMessage. Here I am using the constructor with parameters from, to, subject, and body. Note the to can contain multiple people separated with comma. Same thing also applies to CC.Add method. Adding attachment is as easy.

MailMessage msg = new("one@work.com", "two@work.com, three@work.com", "Subject line", 
    "Mail message - this is <b>beautiful</b> email.");
msg.IsBodyHtml = true;
msg.CC.Add("four@work.com, five@work.com");
string attachmentPath = "some_important.data";
msg.Attachments.Add(new(attachmentPath, MediaTypeNames.Application.Octet));

Last thing, we can send it and handle potential exceptions.

try
{
    smtpClient.Send(msg);
}
catch (SmtpException ex)
{
    // There is a problem, log it or handle it somehow
}