タイトルまま。
//using System.Net; //Dns.GetHostAddresses()の戻りはIPAddress[] //IPv6含めて全部出てくる foreach (var tmp in Dns.GetHostAddresses(Dns.GetHostName())) { Console.WriteLine("{0}:{1}", tmp.AddressFamily, tmp.ToString()); //IPv4が欲しい時はこれで //if (tmp.AddressFamily == AddressFamily.InterNetwork) //{ // Console.WriteLine(tmp); // break; //} }