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IPGlobalProperties.GetUnicastAddresses Method

Retrieves the stable unicast IP address table on the local computer.

Namespace:  System.Net.NetworkInformation
Assembly:  System (in System.dll)

abstract GetUnicastAddresses : unit -> UnicastIPAddressInformationCollection 
override GetUnicastAddresses : unit -> UnicastIPAddressInformationCollection 

Return Value

Type: System.Net.NetworkInformation.UnicastIPAddressInformationCollection
A UnicastIPAddressInformationCollection that contains a list of stable unicast IP addresses on the local computer.


The call to the native GetAdaptersAddresses function failed.


This method is not implemented on the platform. This method uses the native NotifyStableUnicastIpAddressTable function that is supported on Windows Vista and later.


The caller does not have necessary Read permission.


The call to the native NotifyStableUnicastIpAddressTable function failed.

In order to support outbound connections or to accept incoming connections on a Teredo interface, applications need to ensure that the Teredo interface is up and ready for use. This is because Teredo can go into a dormant state when not used for some period of time.

The GetUnicastAddresses method will allow an application to retrieve the list of stable unicast IP addresses. The IPAddress.IsIPv6Teredo property can be used to determine if an IP address is an IPv6 Teredo address with the prefix of 2001::/32.

The GetUnicastAddresses method also returns non-Teredo addresses and provides a more convenient way to obtain the unicast IP addresses for a system than enumerating all the System.Net.NetworkInformation.NetworkInterface objects on a local computer and querying the associated IP addresses.

.NET Framework

Supported in: 4

.NET Framework Client Profile

Supported in: 4

Windows 7, Windows Vista SP1 or later, Windows Server 2008 (Server Core not supported), Windows Server 2008 R2 (Server Core supported with SP1 or later)

The .NET Framework does not support all versions of every platform. For a list of the supported versions, see .NET Framework System Requirements.