问如何在SSIS SMTP连接管理器中指定简单身份验证的凭据？

EN

using System.Diagnostics;
using System.Net;
using System.Net.Mail;


    public void Main()
    {
        string UserName = Dts.Variables["UserName"].Value.ToString();
        string Password = Dts.Variables["Password"].Value.ToString();
        string EmailRecipient = Dts.Variables["EmailRecipient"].Value.ToString();
        string EmailSender = Dts.Variables["EmailSender"].Value.ToString();

        string SMTPEndPoint = Dts.Variables["SMTPEndPoint"].Value.ToString();
        Int32.TryParse(Dts.Variables["SMTPPort"].Value.ToString(), out int SMTPPort);

        string MessageSubject = Dts.Variables["MessageSubject"].Value.ToString();
        string MessageBody = Dts.Variables["MessageBody"].Value.ToString();

        MailMessage msg = new MailMessage();
        msg.To.Add(new MailAddress(EmailRecipient));
        msg.From = new MailAddress(EmailSender);
        msg.Subject = MessageSubject;
        msg.Body = MessageBody +
            "\n" +
            "\n" +
            "DISCLAIMER: The information contained in this transmission may contain privileged and confidential information. " +
            "It is intended only for the use of the person(s) named above.If you are not the intended recipient, " +
            "you are hereby notified that any review, dissemination, distribution or duplication of this communication " +
            "is strictly prohibited. If you are not the intended recipient, please contact the sender by reply email and destroy all copies of the original message.";


        SmtpClient client = new SmtpClient(SMTPEndPoint, SMTPPort)
        {
            EnableSsl = true,
            DeliveryMethod = SmtpDeliveryMethod.Network,
            Credentials = new NetworkCredential(UserName, Password)
        };
        try
        {
            client.Send(msg);
        }
        catch (Exception e)
        {
            Debug.WriteLine(e);
        }
        Dts.TaskResult = (int)ScriptResults.Success;
    }