利用委托异步发送邮件

class Program { static void Main(string[] args) { MyEmail myEmail = new MyEmail(); Asnys(myEmail); } delegate void DelegateName(MyEmail myEmail); public static void Asnys(MyEmail myEmail) { DelegateName dn = new DelegateName(SendEmail); AsyncCallback ac = new AsyncCallback(NoSeleep); dn.BeginInvoke(myEmail, ac, dn); Console.WriteLine("这才是真的没睡"); Console.ReadLine(); } private static void SleepNmin(int i) { Thread.Sleep(i * 1000); Console.WriteLine("我睡了" + i.ToString() + "秒"); } private static void NoSeleep(IAsyncResult iar) { SleepNmin(2); Console.WriteLine("我可没有睡,都执行完了再叫我"); DelegateName dn = iar.AsyncState as DelegateName; dn.EndInvoke(iar); } private static void SendEmail(MyEmail myEmail) { //这里发送邮件 Console.WriteLine("邮件发送完毕"); } } class MyEmail { public string ss; }