using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading.Tasks;

namespace FlyweightPattern
{
    class Program
    {
        static void Main(string[] args)
        {

            for (int i = 0; i < 2000000; i++)
            {
                string receiver = $"kehu{i}@qq.com";
                //通过简单工厂维护的对象池获取已经封装好的内部状态的对象。
                var email = EmailTemplateFactory.GetTemplate("阿里云漏洞修复");
                //修改外部状态
                email.Receiver = receiver;
                SendEmail(email);
            }

            Console.ReadLine();
        }

        private static void SendEmail(Email email)
        {
            Console.WriteLine($"主题为『{email.Subject}』的邮件已发送至：{email.Receiver}");
        }
    }
}