Returns the Internet Protocol (IP) addresses for the specified host.
Assembly: System (in System.dll)
- Type: System.String
The host name or IP address to resolve.
hostNameOrAddress is a null reference (Nothing in Visual Basic).
The length of hostNameOrAddress is greater than 255 characters.
An error is encountered when resolving hostNameOrAddress.
hostNameOrAddress is an invalid IP address.
The 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.
IPv6 addresses are filtered from the results of the method if the local computer does not have IPv6 installed. As a result, it is possible to get back an empty IPAddress instance if only IPv6 results where available for the hostNameOrAddress.parameter.
This member emits trace information when you enable network tracing in your application. For more information, see Network Tracing.
Windows 7, Windows Vista SP1 or later, Windows XP SP3, Windows XP SP2 x64 Edition, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later), Windows Server 2003 SP2
The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.