string name = Dns.GetHostName();

 IPHostEntry IpEntry = Dns.GetHostEntry(name);

 string ip = "";

 for (int i = ; i < IpEntry.AddressList.Length; i++)

 {

     //从IP地址列表中筛选出IPv4类型的IP地址

     //AddressFamily.InterNetwork表示此IP为IPv4,

     //AddressFamily.InterNetworkV6表示此地址为IPv6类型

     if (IpEntry.AddressList[i].AddressFamily == AddressFamily.InterNetwork)

     {

          ip= IpEntry.AddressList[i].ToString();

     }

 }