Query Network interface with C#

Question

Hello,
I'm developing a C# winforms application under Windows server 2008 (64bit)
Is there a way to query all network interfaces installed in the PC and check their IP address and if there is an ethernet connection (connected \ not connected) ?
I want to do it with Microsoft C# classes. 
Best regards,
Z.V

Answer 1

Hi,
Solution 1:>
Step1:>
UdpClient u = new UdpClient(remoteAddress, 1);
IPAddress localAddr = ((IPEndPoint)u.Client.LocalEndPoint).Address;
Step2:>
foreach (NetworkInterface nic in NetworkInterface.GetAllNetworkInterfaces())
IPInterfaceProperties ipProps = nic.GetIPProperties();
// check if localAddr is in ipProps.UnicastAddresses
Solution 2:>
foreach(NetworkInterface ni in NetworkInterface.GetAllNetworkInterfaces())
if(ni.NetworkInterfaceType == NetworkInterfaceType.Wireless80211 || ni.NetworkInterfaceType == NetworkInterfaceType.Ethernet)
Console.WriteLine(ni.Name);
foreach (UnicastIPAddressInformation ip in ni.GetIPProperties().UnicastAddresses)
if (ip.Address.AddressFamily == System.Net.Sockets.AddressFamily.InterNetwork)
Console.WriteLine(ip.Address.ToString());
Documentation:>
NetworkInterface.GetAllNetworkInterfaces Method
Good Tutorial:>
http://www.codeproject.com/Articles/64975/Detect-Internet-Network-Availability
Mark as answer or vote as helpful if you find it useful | Ammar Zaied [MCP]