C# win7下获取ip地址

 private string GetLocalIp()
        {
            string localIp;
            IPHostEntry host;
            host = Dns.GetHostEntry(Dns.GetHostName());
            if (host.AddressList.Count() > 1)
            {
                //win7 ip
                localIp = host.AddressList[1].ToString();
            }
            else
            {
                //xp
                localIp = host.AddressList[0].ToString();
            }

            return localIp;

        }