using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Threading;
using System.Threading.Tasks;
namespace DelegateDemo2
{
class Program
{
static void Main(string[] args)
{
WaitCallback _callback = null;
Console.WriteLine("thread:" + System.Threading.Thread.CurrentThread.ManagedThreadId);
for (int i = 0; i < 10; i++)
{
if (_callback == null)
{
_callback = new WaitCallback(Handle);
}
ThreadPool.QueueUserWorkItem(_callback, i);
Console.WriteLine(i);
}
Console.Read();
}
public static void Handle(Object obj)
{
Console.WriteLine("thread:" + System.Threading.Thread.CurrentThread.ManagedThreadId);
Console.WriteLine((int)obj * 100);
}
}
}
OutPut:
thread:1
0
1
2
3
4
5
6
7
thread:3
thread:5
thread:4
100
thread:4
400
thread:4
500
thread:4
600
thread:4
700
200
thread:6
300
0
thread:4
800
8
9
thread:5
900
ThreadPool.QueueUserWorkItem会生成一个线程，而且是随机额，没有先后顺序