获取本机IP

using System;
using System.Collections.Generic;
using System.ComponentModel;
using System.Data;
using System.Drawing;
using System.Linq;
using System.Text;
using System.Threading.Tasks;
using System.Windows.Forms;

using System.Net;
using System.Net.Sockets;
using System.Net.NetworkInformation;

namespace netWindowsFormsApp1
{
    public partial class Form1 : Form
    {
        public Form1()
        {
            InitializeComponent();
        }
        //以下测试状况，电脑绑定了两个有线网ip，不通外网，和两个虚拟机ip
        private void get_ip_button_Click(object sender, EventArgs e)
        {
            //获取本机ip方法1 
            IPHostEntry host = Dns.GetHostEntry(Dns.GetHostName());
            foreach (var ip in host.AddressList)
            {
                //判断是否是ipv4地址，如果判断ipv6地址用InterNetworkV6
                if (ip.AddressFamily == AddressFamily.InterNetwork)
                    listBox1.Items.Add(ip.ToString());
            }

            //获取本机ip方法1
            string localIP = string.Empty;
            using (Socket socket = new Socket(AddressFamily.InterNetwork, SocketType.Dgram, 0))
            {
                socket.Connect("8.8.8.8", 65530);
                IPEndPoint endPoint = socket.LocalEndPoint as IPEndPoint;
                localIP = endPoint.Address.ToString();
            }
            listBox2.Items.Add(localIP);

            //获取本机ip方法3
            getLocalIPAddressWithNetworkInterface(NetworkInterfaceType.Ethernet);
        }

        //获取本机ip方法3
        public void getLocalIPAddressWithNetworkInterface(NetworkInterfaceType _type)
        {
            foreach (NetworkInterface item in NetworkInterface.GetAllNetworkInterfaces())
            {
                if (item.NetworkInterfaceType == _type && item.OperationalStatus == OperationalStatus.Up)
                {
                    foreach (UnicastIPAddressInformation ip in item.GetIPProperties().UnicastAddresses)
                    {
                        if (ip.Address.AddressFamily == AddressFamily.InterNetwork)
                        {
                            listBox3.Items.Add(ip.Address.ToString());
                        }
                    }
                }
            }
            
        }

        private void start_button_Click(object sender, EventArgs e)
        {
            //Socket sever = new Socket(AddressFamily.InterNetwork , SocketType.Stream , ProtocolType.Tcp );
            //if()
        }
    }
}