在C#加载项中触发收到电子邮件的事件

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

namespace EmailEventExample
{
    public class EmailReceiver
    {
        public event EventHandler<EmailReceivedEventArgs> EmailReceived;

        public void StartReceivingEmails()
        {
            // 设置电子邮件服务器的相关信息
            string emailServer = "your_email_server";
            int port = 587;
            string username = "your_email_username";
            string password = "your_email_password";

            // 创建一个POP3客户端实例
            using (var client = new SmtpClient(emailServer, port))
            {
                client.EnableSsl = true;
                client.Credentials = new NetworkCredential(username, password);

                // 监听新邮件的到达
                client.NewMail += Client_NewMail;

                // 开始接收邮件
                client.Start();
            }
        }

        private void Client_NewMail(object sender, EventArgs e)
        {
            // 获取新邮件的数量
            var client = (SmtpClient)sender;
            int newMailCount = client.GetNewMailCount();

            // 触发邮件接收事件
            OnEmailReceived(newMailCount);
        }

        protected virtual void OnEmailReceived(int newMailCount)
        {
            // 创建一个包含新邮件数量的事件参数
            var args = new EmailReceivedEventArgs(newMailCount);

            // 触发邮件接收事件
            EmailReceived?.Invoke(this, args);
        }
    }

    public class EmailReceivedEventArgs : EventArgs
    {
        public int NewMailCount { get; }

        public EmailReceivedEventArgs(int newMailCount)
        {
            NewMailCount = newMailCount;
        }
    }

    public class Program
    {
        static void Main(string[] args)
        {
            var emailReceiver = new EmailReceiver();
            emailReceiver.EmailReceived += EmailReceiver_EmailReceived;
            emailReceiver.StartReceivingEmails();

            // 等待用户按下任意键退出程序
            Console.ReadKey();
        }

        private static void EmailReceiver_EmailReceived(object sender, EmailReceivedEventArgs e)
        {
            // 处理接收到的邮件事件
            Console.WriteLine($"收到了 {e.NewMailCount} 封新邮件！");
        }
    }
}