C# 抓IP

// 取得本機的IpHostEntry類別實體，MSDN建議新的用法
            IPHostEntry iphostentry = Dns.GetHostEntry(Dns.GetHostName());
            // 取得所有 IP 位址
            foreach (IPAddress ipaddress in iphostentry.AddressList)
            {
                // 只取得IP V4的Address
                if (ipaddress.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
                {
                    Console.WriteLine("Local IP: " + ipaddress.ToString());
                }
            }