NetworkInterface Class
Provides configuration and statistical information for a network interface.
Assembly: System (in System.dll)
The NetworkInterface type exposes the following members.
| Name | Description | |
|---|---|---|
![]() | Description | Gets the description of the interface. |
![]() | Id | Gets the identifier of the network adapter. |
![]() | IsReceiveOnly | Gets a Boolean value that indicates whether the network interface is set to only receive data packets. |
![]() ![]() | LoopbackInterfaceIndex | Gets the index of the IPv4 loopback interface. |
![]() | Name | Gets the name of the network adapter. |
![]() | NetworkInterfaceType | Gets the interface type. |
![]() | OperationalStatus | Gets the current operational state of the network connection. |
![]() | Speed | Gets the speed of the network interface. |
![]() | SupportsMulticast | Gets a Boolean value that indicates whether the network interface is enabled to receive multicast packets. |
| Name | Description | |
|---|---|---|
![]() | Equals(Object) | Determines whether the specified Object is equal to the current Object. (Inherited from Object.) |
![]() | Finalize | Allows an object to try to free resources and perform other cleanup operations before it is reclaimed by garbage collection. (Inherited from Object.) |
![]() ![]() | GetAllNetworkInterfaces | Returns objects that describe the network interfaces on the local computer. |
![]() | GetHashCode | Serves as a hash function for a particular type. (Inherited from Object.) |
![]() | GetIPProperties | Returns an object that describes the configuration of this network interface. |
![]() | GetIPv4Statistics | Gets the IPv4 statistics. |
![]() ![]() ![]() | GetIsNetworkAvailable | Indicates whether any network connection is available. |
![]() | GetPhysicalAddress | Returns the Media Access Control (MAC) or physical address for this adapter. |
![]() | GetType | Gets the Type of the current instance. (Inherited from Object.) |
![]() | MemberwiseClone | Creates a shallow copy of the current Object. (Inherited from Object.) |
![]() | Supports | Gets a Boolean value that indicates whether the interface supports the specified protocol. |
![]() | ToString | Returns a string that represents the current object. (Inherited from Object.) |
This class encapsulates data for network interfaces, also known as adapters, on the local computer. You do not create instances of this class; the GetAllNetworkInterfaces method returns an array that contains one instance of this class for each network interface on the local computer.
The following code example displays information about interfaces.
void ShowNetworkInterfaces() { IPGlobalProperties ^ computerProperties = IPGlobalProperties::GetIPGlobalProperties(); array<NetworkInterface^>^nics = NetworkInterface::GetAllNetworkInterfaces(); Console::WriteLine( "Interface information for {0}.{1} ", computerProperties->HostName, computerProperties->DomainName ); if ( nics == nullptr || nics->Length < 1 ) { Console::WriteLine( " No network interfaces found." ); return; } Console::WriteLine( " Number of interfaces .................... : {0}", nics->Length ); System::Collections::IEnumerator^ myEnum4 = nics->GetEnumerator(); while ( myEnum4->MoveNext() ) { NetworkInterface ^ adapter = safe_cast<NetworkInterface ^>(myEnum4->Current); IPInterfaceProperties ^ properties = adapter->GetIPProperties(); Console::WriteLine(); Console::WriteLine( adapter->Description ); Console::WriteLine( String::Empty->PadLeft( adapter->Description->Length, '=' ) ); Console::WriteLine( " Interface type .......................... : {0}", adapter->NetworkInterfaceType ); Console::WriteLine( " Physical Address ........................ : {0}", adapter->GetPhysicalAddress() ); Console::WriteLine( " Operational status ...................... : {0}", adapter->OperationalStatus ); String^ versions = ""; // Create a display string for the supported IP versions. if ( adapter->Supports( NetworkInterfaceComponent::IPv4 ) ) { versions = "IPv4"; } if ( adapter->Supports( NetworkInterfaceComponent::IPv6 ) ) { if ( versions->Length > 0 ) { versions = String::Concat( versions, " " ); } versions = String::Concat( versions, "IPv6" ); } Console::WriteLine( " IP version .............................. : {0}", versions ); ShowIPAddresses( properties ); // The following information is not useful for loopback adapters. if ( adapter->NetworkInterfaceType == NetworkInterfaceType::Loopback ) { continue; } Console::WriteLine( " DNS suffix .............................. : {0}", properties->DnsSuffix ); String^ label; if ( adapter->Supports( NetworkInterfaceComponent::IPv4 ) ) { IPv4InterfaceProperties ^ ipv4 = properties->GetIPv4Properties(); Console::WriteLine( " MTU...................................... : {0}", ipv4->Mtu ); if ( ipv4->UsesWins ) { IPAddressCollection ^ winsServers = properties->WinsServersAddresses; if ( winsServers->Count > 0 ) { label = " WINS Servers ............................ :"; ShowIPAddresses( label, winsServers ); } } } Console::WriteLine( " DNS enabled ............................. : {0}", properties->IsDnsEnabled ); Console::WriteLine( " Dynamically configured DNS .............. : {0}", properties->IsDynamicDnsEnabled ); Console::WriteLine( " Receive Only ............................ : {0}", adapter->IsReceiveOnly ); Console::WriteLine( " Multicast ............................... : {0}", adapter->SupportsMulticast ); ShowInterfaceStatistics( adapter ); Console::WriteLine(); } }
- SecurityPermission
for executing unmanaged code. Associated enumeration: UnmanagedCode
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.

