static void Test() {
         Console.WriteLine("Test事件開始執(zhí)行");
            Thread.Sleep(1000);
            Console.WriteLine("Test事件睡眠之后打印數(shù)據(jù)");
            Console.WriteLine("Test事件id: " + Thread.CurrentThread.ManagedThreadId);
        }
        static void Main(string[] args)
        {
            #region //主線程id
            Console.WriteLine("主線程id: " + Thread.CurrentThread.ManagedThreadId);
            #endregion
            #region //傳遞一個(gè)方法給線程，執(zhí)行方法
            Thread t = new Thread(Test);
            t.Start();
            #endregion
}

 
        static int Downlod(object obj) {
            string str = obj as string;
            Console.WriteLine(str);
        }
     static void Main(string[] args)
        {
      Thread t1 = new Thread(Downlod);
           //這里傳遞的參數(shù)是字符串
            t1.Start("數(shù)據(jù)傳遞方法執(zhí)行 ，數(shù)據(jù)傳遞方法id： "+Thread.CurrentThread.ManagedThreadId);
}

     static void Main(string[] args)
        {
// 使用 DownloadTool 實(shí)例化并傳遞數(shù)據(jù)
DownloadTool downloadTool = new DownloadTool("www.baidu.com", "這是下載鏈接哦");
Thread thread = new Thread(downloadTool.Download);
thread.Start();
}
public class DownloadTool
{
    private string url;
    private string message;
    public DownloadTool(string url, string message)
    {
        this.url = url;
        this.message = message;
    }
    public void Download()
    {
        Console.WriteLine("下載鏈接: " + url);
        Console.WriteLine("提示信息: " + message);
        Console.WriteLine("Download 線程 ID: " + Thread.CurrentThread.ManagedThreadId);
    }
}
 

  internal class Program
    {
        static void A()
        {
            int i = 0;
            while (true)
            {
                i++;
                Console.WriteLine($"A 輸出第{i}");
                Thread.Sleep(1000);
            }
        }
        static void B()
        {
            int i = 0;
            while (true)
            {
                i++;
                Console.WriteLine($"B 輸出第{i}");
                Thread.Sleep(1000);
            }
        }
        static void Main(string[] args)
        {
            //在C#中，線程的優(yōu)先級(jí)可以通過Thread.Priority屬性來設(shè)置和獲取。
//        Lowest: 線程的優(yōu)先級(jí)是最低的。在系統(tǒng)中存在其他活動(dòng)線程時(shí)，此優(yōu)先級(jí)的線程很少得到執(zhí)行。
//BelowNormal: 線程的優(yōu)先級(jí)低于正常線程。
//Normal: 線程的優(yōu)先級(jí)是普通的，這是線程的默認(rèn)優(yōu)先級(jí)。
//AboveNormal: 線程的優(yōu)先級(jí)高于正常線程。
//Highest: 線程的優(yōu)先級(jí)是最高的。此優(yōu)先級(jí)的線程會(huì)盡量優(yōu)先于其他所有優(yōu)先級(jí)的線程執(zhí)行。
            Thread a = new Thread(A);
            Thread b = new Thread(B);
            a.Priority = ThreadPriority.Highest;
            a.Start();
            b.Priority = ThreadPriority.Lowest;
            b.Start();
            Console.WriteLine("按任意鍵停止線程...");
            Console.ReadKey();
            a.Join();
            b.Join();
            Console.WriteLine("線程已停止");
        }
    }

using System;
using System.Threading;
class Program
{
    static void Main(string[] args)
    {
        // 將任務(wù)排入線程池
        ThreadPool.QueueUserWorkItem(DoWork, "任務(wù) 1");
        ThreadPool.QueueUserWorkItem(DoWork, "任務(wù) 2");
        Console.WriteLine("主線程完成");
        Thread.Sleep(3000); // 等待線程池中的任務(wù)完成
    }
    static void DoWork(object state)
    {
        string taskName = (string)state;
        Console.WriteLine($"{taskName} 開始執(zhí)行 - 線程ID: {Thread.CurrentThread.ManagedThreadId}");
        Thread.Sleep(1000); // 模擬耗時(shí)操作
        Console.WriteLine($"{taskName} 執(zhí)行完成 - 線程ID: {Thread.CurrentThread.ManagedThreadId}");
    }
}

     static void Main(string[] args)
        {
  //使用tesk多線程
           int a= Task.Run(() =>
            {
              int a =  Dowload();
                return a;
            }).Result;
            Task<int> task = Task<int>.Run(()=>{
             int a =   Dowload();
                return a;
            });
            //初始化一個(gè)CancellationTokenSource實(shí)例
            CancellationTokenSource source = new CancellationTokenSource();
            //task.Start();
            task.Wait(1000);
            source.Cancel();
        int result  =    task.Result;
            Console.WriteLine(result);
            Console.WriteLine($"tesk返回值{a}");
}
        static int  Dowload() {
            int a = 0;
            for (int i = 0; i < 10; i++)
            {
              a=  a + i + 1;
            }
         int?  id= Task.CurrentId;
            Console.WriteLine("Current thread ID: " + id);
            return a;
        }

  static void Main(string[] args)
        {
             //調(diào)用方法循環(huán)創(chuàng)建新的線程來執(zhí)行方法
            StateObject state = new StateObject();
            for (int i = 0; i < 30; i++)
            {
                Thread thread = new Thread(state.ChangState);
                thread.Start();
            }
            Console.ReadKey();
        }
//一個(gè)StateObject類
        public class StateObject
        {
            private int state = 5;
//里面有個(gè)狀態(tài)改變方法，當(dāng)狀態(tài)等于5的時(shí)候進(jìn)入到方法中，然后state+1 打印的應(yīng)該是6 和線程id
            public void ChangState()
            {
                if (state == 5)
                {
                    state++;
                    Console.WriteLine($"state：{state}  線程id：" + Thread.CurrentThread.ManagedThreadId);
                }
                state = 5;
            }
        }

        static void Main(string[] args)
        {
            StateObject state = new StateObject();
            for (int i = 0; i < 100; i++)
            {
                Thread thread = new Thread(state.ChangState);
                thread.Start();
            }
            Console.ReadKey();
        }
        public class StateObject
        {
            private object _lock = new object();
            private int state = 5;
            public void ChangState()
            {
                //使用鎖保證每次執(zhí)行方法的都是一個(gè)線程，防止資源沖突
                lock (_lock)
                {
                    if (state == 5)
                    {
                        state++;
                        Console.WriteLine($"state：{state}  線程id：" + Thread.CurrentThread.ManagedThreadId);
                    }
                    state = 5;
                }
            }
        }

   static void Main(string[] args)
        {
            DeadlockExample deadlockExample = new DeadlockExample();
            Thread t1 = new Thread(deadlockExample.Thread1);
            Thread t2 = new Thread(deadlockExample.Thread2);
            t1.Start();
            t2.Start();
            t1.Join();
            t2.Join();
            Console.ReadKey();
        }
    }
   public  class DeadlockExample
    {
        private static object lock1 = new object();
        private static object lock2 = new object();
        public  void Thread1()
        {
            lock (lock1)
            {
                Console.WriteLine("線程1：已獲取鎖1，正在等待鎖2。。。");
                Thread.Sleep(100);  // 模擬某些工作
                lock (lock2)
                {
                    Console.WriteLine("線程1：獲得鎖2");
                }
            }
        }
        public  void Thread2()
        {
            lock (lock2)
            {
                Console.WriteLine("線程2：已獲取鎖2，正在等待鎖1。。。");
                Thread.Sleep(100);  // 模擬某些工作
                lock (lock1)
                {
                    Console.WriteLine("線程2：獲得鎖1");
                }
            }
        }
    }