static void Main(string[] args)
{
Console.WriteLine("这是主线程 ID:" + Thread.CurrentThread.ManagedThreadId);
//无参无返回值
DoSomething doSomething = Method1;
doSomething.BeginInvoke(null, null);
//无参有返回值
DoSomethingReturn doSomethingReturn = Method2;
IAsyncResult iasyncResult = doSomethingReturn.BeginInvoke(null, null);
int result = doSomethingReturn.EndInvoke(iasyncResult);//要获取委托的返回值，必须等待子线程执行结束
//有参无返回值
DoMore doMore = Method3;
doMore.BeginInvoke(16, "guo", null, null);
//有参有返回值
DoMoreReturn doMoreReturn = Method4;
IAsyncResult iasyncResult2 = doMoreReturn.BeginInvoke(16, "guo", null, null);
int result2 = doMoreReturn.EndInvoke(iasyncResult2);//要获取委托的返回值，必须等待子线程执行结束
//异步回调
DoMoreReturn doMoreReturn2 = Method4;
doMoreReturn2.BeginInvoke(16, "guo", Callback, "wulala");
Console.ReadKey();
}
private static void Callback(IAsyncResult iasyncResult)
{
Console.WriteLine("Callback-Start【ThreadId=" + Thread.CurrentThread.ManagedThreadId + "】：" + DateTime.Now);
AsyncResult asyncResult = (AsyncResult)iasyncResult;
//获取回调方法的参数
string parameter = asyncResult.AsyncState.ToString();
//获取委托的返回值
DoMoreReturn doMore = (DoMoreReturn)asyncResult.AsyncDelegate;
int result = doMore.EndInvoke(asyncResult);
Thread.Sleep(3000);
Console.WriteLine("result={0},parameter={1}", result, parameter);
Console.WriteLine("Callback-End【ThreadId=" + Thread.CurrentThread.ManagedThreadId + "】：" + DateTime.Now);
}