C#实现得到本机IP以及网关地址

        // 得到本机IP      
        private string GetLocalIP() 
        {
            //本机IP地址
            string strLocalIP = "";
            //得到计算机名
            string strPcName = Dns.GetHostName();
            //得到本机IP地址数组
            IPHostEntry ipEntry = Dns.GetHostEntry(strPcName);
            //遍历数组
            foreach(var IPadd in ipEntry.AddressList)
            {
                //判断当前字符串是否为正确IP地址
                if (IsRightIP(IPadd.ToString())) 
                {
                    //得到本地IP地址
                    strLocalIP = IPadd.ToString();                   
                    break;
                }
            }           
            return strLocalIP;
        }

      //得到网关地址
        private string GetGateway() 
        {  
            string strGateway = "";
            //获取所有网卡
            NetworkInterface[] nics = NetworkInterface.GetAllNetworkInterfaces();
            //遍历数组
            foreach (var netWork in nics)
            {
                //单个网卡的IP对象
                IPInterfaceProperties ip = netWork.GetIPProperties();
                //获取该IP对象的网关
                GatewayIPAddressInformationCollection gateways = ip.GatewayAddresses;
                foreach(var gateWay in gateways)
                {
                    //如果能够Ping通网关
                    if(IsPingIP(gateWay.Address.ToString()))
                    {
                        //得到网关地址
                        strGateway = gateWay.Address.ToString();
                        //跳出循环
                        break;
                    }
                }
                //如果已经得到网关地址
                if (strGateway.Length > 0) 
                {                
                    break;
                }
            }           
            return strGateway;
        }

        /// 尝试Ping指定IP是否能够Ping通      
        /// 指定IP
        /// true 是 false 否
        public static bool IsPingIP(string strIP) 
        {
            try
            {                
                Ping ping = new Ping();
                //接受Ping返回值
                PingReply reply = ping.Send(strIP, 1000);
                //Ping通
                return true;
            }
            catch 
            {
                //Ping失败
                return false;
            }
        }