多线程运行，主线程等待。
private static void Test2()
{
var waits = new List<EventWaitHandle>();
for (int i = 0; i < 10; i++)
{
var handler = new ManualResetEvent(false);
waits.Add(handler);
new Thread(new ParameterizedThreadStart(Print))
{
Name = "thread" + i.ToString()
}.Start(new Tuple<int, EventWaitHandle>(i, handler));
}
WaitHandle.WaitAll(waits.ToArray());
Console.WriteLine("All Completed!");
Console.Read();
}
private static void Print(object param)
{
var p = (Tuple<int, EventWaitHandle>)param;
Console.WriteLine(Thread.CurrentThread.Name + ": Begin!");
if (p.Item1 == 2) Thread.Sleep(1200);
else if (p.Item1 ==1 ) Thread.Sleep(2000);
else Thread.Sleep(1000);
Console.WriteLine(Thread.CurrentThread.Name + ": Print" + p.Item1);
Console.WriteLine(Thread.CurrentThread.Name + ": End!");
p.Item2.Set();
}