C# 获取本机内网 IPv4 地址

using System.Linq;
using System.Net;
using System.Net.Sockets;

        /// <summary>
        /// 获取本机内网 IPv4 地址
        /// </summary>
        /// <returns></returns>
        public static string GetLocalIPv4()
        {
            var ipv4s = Dns.GetHostAddresses(Dns.GetHostName()) //根据主机名称解析主机ip地址
                        .Where(p => p.AddressFamily == AddressFamily.InterNetwork) //筛选出所有ipv4地址
                        .Select(p => p.MapToIPv4().ToString());
            if (ipv4s.Count() > 1)
                return ipv4s.Where(p => p.StartsWith("192")).FirstOrDefault(); //如果有多个，返回192开头的ipv4地址
            else
                return ipv4s.FirstOrDefault();
        }