IOS IPV6支持

private AddressFamily addressFamily = AddressFamily.InterNetwork;

  //判断是域名还是IP

  if (System.Text.RegularExpressions.Regex.Matches(this.address, "[a-zA-Z]").Count > 0)

  {

  IPHostEntry ipHostInfo = Dns.GetHostEntry(this.address);

  for (int i = 0; i < ipHostInfo.AddressList.Length; i++)

  {

if (ipHostInfo.AddressList[i].AddressFamily == AddressFamily.InterNetworkV6) //是ipv6

  {

  ipAddress = ipHostInfo.AddressList[i];

addressFamily = AddressFamily.InterNetworkV6;

  break;

  }

  }

  if (ipAddress == null)

  {

  ipAddress = ipHostInfo.AddressList[0];

  }

  }

  else

  {

  if (!IPAddress.TryParse(this.address, out ipAddress))

  throw new ArgumentException("Provided remoteIPAddress string was not successfully parsed.", "remoteIPAddress");

  }

socket = new Socket(addressFamily, SocketType.Stream, ProtocolType.Tcp);