How can you send HTML emails in C#?

Question

ICSM Computer · Answer

To send HTML emails in C#, you just need to set the MailMessage.IsBodyHtml property to
true. This tells the SMTP system to treat the body as HTML instead of plain text.
Example: Sending an HTML Email in C#
using System.Net;
using System.Net.Mail;
class Program
{
    static void Main()
    {
        var fromAddress = new MailAddress("your-email@example.com", "Your Name");
        var toAddress = new MailAddress("recipient@example.com", "Recipient Name");
        const string subject = "Welcome to Our Service!";
        string htmlBody = @"
            andlt;htmlandgt;
            andlt;bodyandgt;
                andlt;h2 style='color:blue;'andgt;Hello!andlt;/h2andgt;
                andlt;pandgt;Thank you for signing up. Click below to get started:andlt;/pandgt;
                andlt;a href='https://example.com/start' style='padding:10px 20px; background-color:green; color:white; text-decoration:none;'andgt;Get Startedandlt;/aandgt;
            andlt;/bodyandgt;
            andlt;/htmlandgt;";
        var smtp = new SmtpClient
        {
            Host = "smtp.example.com",
            Port = 587,
            EnableSsl = true,
            DeliveryMethod = SmtpDeliveryMethod.Network,
            UseDefaultCredentials = false,
            Credentials = new NetworkCredential("your-email@example.com", "your-email-password")
        };
        using (var message = new MailMessage(fromAddress, toAddress)
        {
            Subject = subject,
            Body = htmlBody,
            IsBodyHtml = true
        })
        {
            smtp.Send(message);
        }
    }
}
Key Notes
IsBodyHtml = true: This is essential to render HTML correctly.You can use full HTML, including images (linked via URL), inline styles, and layout tables.Be careful with inline CSS: Many email clients strip or ignore external stylesheets.
Want to Add Attachments or Inline Images?
Use message.Attachments.Add(...) for files.Use LinkedResource inside an AlternateView to embed images inline.

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How can you send HTML emails in C#?

ICSM Computer

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Example: Sending an HTML Email in C#

Key Notes

Want to Add Attachments or Inline Images?

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