Why Am I Getting a 'Property Cannot Be Assigned' Error When Sending SMTP Emails?

Troubleshooting "Property Cannot Be Assigned" Error in SMTP Email Sending

Sending emails via SMTP can sometimes throw a frustrating "property cannot be assigned" error. This typically occurs when trying to set the recipient ("To") or sender ("From") addresses of a MailMessage object after it's been created.

The problem stems from the fact that the To and From properties of MailMessage are read-only. This means you must set these properties during the object's initialization. Here's the correct approach:

<code class="language-csharp">using System.Net.Mail;

// ... other code ...

MailMessage mail = new MailMessage("from@example.com", "to@example.com");
SmtpClient client = new SmtpClient();
client.Port = 25;
client.DeliveryMethod = SmtpDeliveryMethod.Network;
client.UseDefaultCredentials = false;
client.Host = "smtp.gmail.com";
mail.Subject = "Test Email";
mail.Body = "This is a test email body.";
client.Send(mail);</code>

By providing the sender and recipient addresses directly within the MailMessage constructor, you avoid the read-only property error and ensure successful email delivery. Remember to replace "from@example.com" and "to@example.com" with your actual email addresses.

The above is the detailed content of Why Am I Getting a 'Property Cannot Be Assigned' Error When Sending SMTP Emails?. For more information, please follow other related articles on the PHP Chinese website!