UDP|：
            IPEndPoint A = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8001);
            IPEndPoint B = new IPEndPoint(IPAddress.Parse("127.0.0.1"), 8002);
            UdpClient client1 = new UdpClient(A);
            UdpClient client2 = new UdpClient(B);
            string s = "123";
            Console.WriteLine("A发送：" + s);
            byte[] bytes = Encoding.UTF8.GetBytes(s);
            client1.Send(bytes, bytes.Length, B);
            byte[] bytes1 = client2.Receive(ref A);
            string str = Encoding.UTF8.GetString(bytes1);
            Console.WriteLine("B接收到：" + str);
            Console.ReadLine();


TCPClient：
            Console.WriteLine("Client正在连接");
            TcpClient client = new TcpClient("127.0.0.1",51888);
            Console.WriteLine("连接成功");
            Console.WriteLine("请输入发送信息：");
            string s = Console.ReadLine();
            NetworkStream networkstream = client.GetStream();
            BinaryReader br = new BinaryReader(networkstream);
            BinaryWriter bw = new BinaryWriter(networkstream);
            bw.Write(s);
            Console.ReadLine();


TCPServer：
            Console.WriteLine("正在监听");
            TcpListener listener = new TcpListener(IPAddress.Parse("127.0.0.1"),51888);
            listener.Start();
            Console.WriteLine("监听成功");
            TcpClient client = listener.AcceptTcpClient();
            NetworkStream network = client.GetStream();
            BinaryReader br = new BinaryReader(network);
            BinaryWriter bw = new BinaryWriter(network);
            string s = br.ReadString();
            Console.WriteLine("接收消息" + s);
            Console.ReadKey();


FlieStream：
         string path=System.IO.Path.Combine(AppDomain.CurrentDomain.BaseDirectory+"file1.txt");
            while (true)
            {
            Console.WriteLine("请选择选项");
            Console.WriteLine("1.读文件");
            Console.WriteLine("2.写文件");
            string choice = Console.ReadLine();
                switch (choice)
                {
                    case "1":
                        {
                            if (!File.Exists(path))
                            {
                                File.WriteAllText(path, "孙楠\n", Encoding.UTF8);
                                break;
                            }
                            else
                            {
                                string message1;
                                using (FileStream fs = File.OpenRead(path))
                                {
                                    StreamReader sr = new StreamReader(fs);
                                   message1= sr.ReadToEnd();
                                   Console.WriteLine(message1);
                                    sr.Close();
                                }
                            }
                        }
                        break;
                    case "2":
                        if (!File.Exists(path))
                        {
                            File.WriteAllText(path, "孙楠\n", Encoding.UTF8);
                        }
                        else
                        {
                            Console.WriteLine("请输入写入的内容:");
                            string message = Console.ReadLine();
                            using (FileStream fs = File.OpenWrite(path))
                            {
                                StreamWriter sw = new StreamWriter(fs);
                                sw.WriteLine(message);
                                sw.Close();
                            }
                        }
                        break;
                    default:
                        break;
                }
            }
            Console.ReadLine();



ProcessByName：
            Console.WriteLine("请输入启动进程的名称（不需要后缀名）:");
            string filename = Console.ReadLine();
            Process p = new Process();
            p.StartInfo.FileName = filename;
            p.StartInfo.WindowStyle = ProcessWindowStyle.Normal;
            p.Start();
            Console.WriteLine("进程已启动");
            Console.WriteLine("进程Id为："+p.Id);
            Console.WriteLine("进程名称为：" + p.ProcessName);
            Console.WriteLine("进程启动时间为：" + p.StartTime.ToString("yyyy-M-d HH:mm:ss"));
            Console.WriteLine("进程内存为：" +string.Format( "{0,10:0}KB",p.WorkingSet64/1024d));
            Console.WriteLine("进程路径："+p.MainModule.FileName);
            Console.ReadLine();


GetAllProcess：
            Process[] ps = Process.GetProcesses();
            int i = 0;
            foreach (var p in ps)
            {
                i++;
                try
                {
                    Console.WriteLine("第" + i + "进程为：" + p.ProcessName);
                    Console.WriteLine("进程Id为：" + p.Id);
                    Console.WriteLine("进程启动时间为：" + p.StartTime.ToString("yyyy-M-d HH:mm:ss"));
                    Console.WriteLine("进程内存为：" + string.Format("{0,10:0}KB", p.WorkingSet64 / 1024d));
                    Console.WriteLine("进程路径：" + p.MainModule.FileName);
                }
                catch 
                {
                    Console.WriteLine("进程路径无法访问");
                
                }
             
            }
            Console.ReadLine();



Thread（WPF）：
using System;
using System.Collections.Generic;
using System.Linq;
using System.Text;
using System.Windows;
using System.Windows.Controls;
using System.Windows.Data;
using System.Windows.Documents;
using System.Windows.Input;
using System.Windows.Media;
using System.Windows.Media.Imaging;
using System.Windows.Navigation;
using System.Windows.Shapes;
using System.Threading;

namespace Thread2
{
    /// <summary>
    /// MainWindow.xaml 的交互逻辑
    /// </summary>
    public partial class MainWindow : Window
    {
        public MainWindow()
        {
            InitializeComponent();
        }

        public volatile bool IsStop;

        private void startbtn_Click(object sender, RoutedEventArgs e)
        {
            startbtn.IsEnabled = false;
            stopbtn.IsEnabled = true;
            IsStop = false;
            TextBlock1.Text = "";
            Thread thread1 = new Thread(MyMethod);
            thread1.IsBackground = true;
            thread1.Start("a ");
            Thread thread2 = new Thread(MyMethod);
            thread2.IsBackground = true;
            thread2.Start("b ");
            Thread thread3 = new Thread(MyMethod);
            thread3.IsBackground = true;
            thread3.Start("c ");
            Thread thread4 = new Thread(MyMethod);
            thread4.IsBackground = true;
            thread4.Start("d ");
        }

        private void AddMessage(string s)
        {
            Action action = delegate()
            {
                TextBlock1.Text += s;
            };
            TextBlock1.Dispatcher.Invoke(action);
        }

        public void MyMethod(object obj)
        {
            string s = obj.ToString();
            while (IsStop == false)
            {
                AddMessage(s);
                Thread.Sleep(100);
            }
            AddMessage("\n线程已终止\n");
        }

        private void stopbtn_Click(object sender, RoutedEventArgs e)
        {
            startbtn.IsEnabled = true;
            stopbtn.IsEnabled = false;
            IsStop = true;
        }
    }
}