asp.net 郵件添加回复

我怎樣才能在欄位中添加一個不同的電子郵件，然後是發件人ReplayTo？似乎MailMessage.ReplyTo已棄用，因此我嘗試ReplyToList改用。

但它告訴我

Property or indexer 'System.Net.Mail.MailMessage.ReplyToList' cannot be assigned to -- it is read only

到目前為止，這是我的程式碼：

var reply = new MailAddressCollection();
reply.Add("test@test.com");
MailMessage mail = new MailMessage(senderEmail,usr.Email,"subject","message");
mail.ReplyToList = reply;
var smtp = new SmtpClient();
smtp.Send(mail);

您不能將其設置為全新的MailAddressCollection，但您可以直接添加到現有的MailAddressCollection，如下所示：

MailMessage mail = new MailMessage(senderEmail,usr.Email,"subject","message");
mail.ReplyToList.Add("test@test.com");
var smtp = new SmtpClient();
smtp.Send(mail);

由於ReplyToList是只讀屬性，因此您可以做的唯一方法是：

mail.ReplyToList.Add(new MailAddress("abc@xyz.com"));
mail.ReplyToList.Add(new MailAddress("def@abc.com"));

引用自：https://stackoverflow.com/questions/3667006