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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();
}

.NET Framework

Supported in: 4.6, 4.5, 4, 3.5, 3.0, 2.0

.NET Framework Client Profile

Supported in: 4, 3.5 SP1
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