如何在C#中发送包含多个地址的电子邮件

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

// 创建电子邮件消息
MailMessage mailMessage = new MailMessage();
mailMessage.From = new MailAddress("sender@example.com");
mailMessage.Subject = "邮件主题";
mailMessage.Body = "邮件正文";

// 添加多个收件人地址
mailMessage.To.Add("recipient1@example.com");
mailMessage.To.Add("recipient2@example.com");
mailMessage.To.Add("recipient3@example.com");

// 添加多个抄送地址
mailMessage.CC.Add("cc1@example.com");
mailMessage.CC.Add("cc2@example.com");

// 添加多个密送地址
mailMessage.Bcc.Add("bcc1@example.com");
mailMessage.Bcc.Add("bcc2@example.com");

// 设置SMTP服务器和端口
SmtpClient smtpClient = new SmtpClient("smtp.example.com", 587);
smtpClient.Credentials = new NetworkCredential("username", "password");

// 发送电子邮件
smtpClient.Send(mailMessage);