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NetworkInterface.GetAllNetworkInterfaces Method

Returns objects that describe the network interfaces on the local computer.

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

public static NetworkInterface[] GetAllNetworkInterfaces()

Return Value

Type: System.Net.NetworkInformation.NetworkInterface[]
A NetworkInterface array that contains objects that describe the available network interfaces, or an empty array if no interfaces are detected.

ExceptionCondition
NetworkInformationException

A Windows system function call failed.

The network interfaces on a computer provide network connectivity. Network interfaces are also known as network adapters.

The following code example displays Domain Name Service (DNS) configuration information for the local computer's network adapters.

public static void DisplayDnsConfiguration()
{
    NetworkInterface[] adapters = NetworkInterface.GetAllNetworkInterfaces();
    foreach (NetworkInterface adapter in adapters)
    {
        IPInterfaceProperties properties = adapter.GetIPProperties();
        Console.WriteLine(adapter.Description);
        Console.WriteLine("  DNS suffix .............................. : {0}",
            properties.DnsSuffix);
        Console.WriteLine("  DNS enabled ............................. : {0}", 
            properties.IsDnsEnabled);
        Console.WriteLine("  Dynamically configured DNS .............. : {0}", 
            properties.IsDynamicDnsEnabled);
    }
    Console.WriteLine();
}
void DisplayDnsConfiguration()
{
    NetworkInterface* adapters[] = NetworkInterface::GetAllNetworkInterfaces();
    System::Collections::IEnumerator* myEnum10 = adapters->GetEnumerator();
    while (myEnum10->MoveNext())
    {
        NetworkInterface* adapter = __try_cast<NetworkInterface*>(myEnum10->Current);
        IPInterfaceProperties* properties = adapter->GetIPInterfaceProperties();
        Console::WriteLine(adapter->Description);
        Console::WriteLine(S"  DNS suffix................................. :{0}",
            properties->DnsSuffix);
        Console::WriteLine(S"  DNS enabled ............................. : {0}",
            __box(properties->IsDnsEnabled));
        Console::WriteLine(S"  Dynamically configured DNS .............. : {0}",
            __box(properties->IsDynamicDnsEnabled));
    }
}

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

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

.NET Framework

Supported in: 3.5, 3.0, 2.0

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