C# thread 共用變數(C# thread lock)

資料來源: https://dotblogs.com.tw/jincode/2016/04/12/225954

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

namespace ThreadSumTest
{
    class Program
    {
        static int threadCount = 0;
        static object countLock=new object();
        static void HelloThread(Object time)
        {
            Console.WriteLine("--START--Now{0},Thread{1}", ((DateTime) time).ToShortTimeString() , Thread.CurrentThread.ManagedThreadId);
            Random ran = new Random();
            Thread.Sleep(ran.Next(0,1000));
            Console.WriteLine("--E N D--Now{0},Thread{1}", ((DateTime)time).ToShortTimeString(), Thread.CurrentThread.ManagedThreadId);
            lock (countLock)
            {
                for (int i = 0; i < 10000; i++)
                {
                    threadCount++;
                } 
            }
        }
        static void Main(string[] args)
        {            
            List<Thread> ThreadList=new List<Thread>();

            for (int i = 0; i < 10; i++)
            {
                ThreadList.Add(new Thread(new ParameterizedThreadStart(HelloThread)));
                ThreadList[i].Start(DateTime.Now);
            }
            foreach (Thread requestThread in ThreadList)
            {
                requestThread.Join();
            }
            Console.WriteLine(threadCount);

        }
 
    }
}