How to get the IP address of the server on which my C# application is running on?

Question

I am running a server, and I want to display my own IP address.

What is the syntax for getting the computer's own (if possible, external) IP address?

Someone wrote the following code.

IPHostEntry host; string localIP = "?"; host = Dns.GetHostEntry(Dns.GetHostName()); foreach (IPAddress ip in host.AddressList) {     if (ip.AddressFamily.ToString() == "InterNetwork")     {         localIP = ip.ToString();     } } return localIP; 

However, I generally distrust the author, and I don't understand this code. Is there a better way to do so?

Answer 1

Nope, that is pretty much the best way to do it. As a machine could have several IP addresses you need to iterate the collection of them to find the proper one.

Edit: The only thing I would change would be to change this:

if (ip.AddressFamily.ToString() == "InterNetwork") 

to this:

if (ip.AddressFamily == AddressFamily.InterNetwork) 

There is no need to ToString an enumeration for comparison.