我的这段代码中，Thread.Sleep(500);即设为绿色背景的那句代码，为什么会影响counter打印出来的数量？，我这个打印出来counter的值只有 0 1 2，有哪位大神能够指导下

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

namespace DestoryThread
{
class Program
{
static void Main(string[] args)
{
ThreadStart childref = new ThreadStart(CallToChildThread);
Console.WriteLine("In Main : Creating The Child Thread");
Thread childThread = new Thread(childref);
childThread.Start();

//停止主线程一段时间
Thread.Sleep(2000);
//终止子线程
Console.WriteLine("In Main : Aborting The Child Thread");
childThread.Abort();
Console.ReadKey();
}
public static void CallToChildThread()
{
try
{
Console.WriteLine("Child Thread Starts");
for (int counter = 0; counter <= 10; counter++)
{

Thread.Sleep(500);
Console.WriteLine(counter);
}
Console.WriteLine("Child Thread Completed");
}
catch (ThreadAbortException e)
{
Console.WriteLine("Thread Abort Exception");
}
finally
{
Console.WriteLine("Couldn't Catch the Thread Exception");
}

}
}
}