title: asp.net mail add ReplyTo
body: <p>How can i add a a different email then the sender in the <code>ReplayTo</code> field ?
  Seems <code>MailMessage.ReplyTo</code> is deprecated so I'm trying to use <code>ReplyToList</code> instead.</p>
  
  <p>But it's telling me that</p>
  
  <pre><code>Property or indexer 'System.Net.Mail.MailMessage.ReplyToList' cannot be assigned to -- it is read only
  </code></pre>
  
  <p>Here is my code so far:</p>
  
  <pre><code>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);
  </code></pre>