The GetHostAddresses method queries a DNS server for the IP addresses associated with a host name. If hostNameOrAddress is an IP address, this address is returned without querying the DNS server.

When an empty string is passed as the host name, this method returns the IPv4 addresses of the local host for all operating systems except Windows Server 2003; for Windows Server 2003, both IPv4 and IPv6 addresses for the local host are returned.

Note:
This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing.

The following code example uses the GetHostAddresses method to resolve an IP address to an array of type IPAddress.

Public Sub DoGetHostAddresses(hostName As [String])

    Dim ips As IPAddress()

    ips = Dns.GetHostAddresses(hostname)

    Console.WriteLine("GetHostAddresses(" + hostname + ") returns: ")

    Dim index As Integer
    For index = 0 To ips.Length - 1
         Console.WriteLine(ips(index))
    Next index
End Sub    

public static void DoGetHostAddresses(string hostname)
{
    IPAddress[] ips;

    ips = Dns.GetHostAddresses(hostname);

    Console.WriteLine("GetHostAddresses({0}) returns:", hostname);

    foreach (IPAddress ip in ips)
    {
        Console.WriteLine("    {0}", ip);
    }
}

   // Determine the Internet Protocol(IP) addresses for a host.
public:
   static void DoGetHostAddress(String^ hostname)
   {
      array<IPAddress^>^ ips;
      ips = Dns::GetHostAddresses(hostname);

      Console::WriteLine("GetHostAddresses({0}) returns:", hostname);
      for each ( IPAddress^ ip in ips )
      {
         Console::Write( "{0} ", ip );
      }
      Console::WriteLine( "" );
   }

• DnsPermission 

  for accessing DNS information. Associated enumeration: PermissionState..::.Unrestricted

Windows 7, Windows Vista, Windows XP SP2, Windows XP Media Center Edition, Windows XP Professional x64 Edition, Windows XP Starter Edition, Windows Server 2008 R2, Windows Server 2008, Windows Server 2003, Windows Server 2000 SP4, Windows Millennium Edition, Windows 98

.NET Framework

Reference