Getting the IP address and host name of a host / webhost using System.Net.

The following code asks you for a host and then returns the IP address of that host. The code is self-explanatory thanks to the comments.

using System;

// using the System.Net namespace

using System.Net;

class Class1

{

[STAThread]

static void Main(string[] args)

{

// Request the name

Console.Write("Please type the name of the host: ");

// Store it in 'host'

string host = Console.ReadLine();

try

{

// Get the DNS information

IPHostEntry ipHost = Dns.GetHostByName(host);

// Display the host name

Console.WriteLine("Host name: {0}", ipHost.HostName);

// Store the list of IP adresses

IPAddress[] ipAddr = ipHost.AddressList;

// Loop to actually display the IP

for(int x = 0; x < ipAddr.Length; x++)

{

Console.WriteLine("IP address: {0}", ipAddr[x].ToString());

}

}

// Catch the exception (if host was not found)

catch(System.Net.Sockets.SocketException)

{

Console.WriteLine("Host not found.");

}

}

}

Here is an example result:

Also if you want to return the hostname of an IP use Dns.Resolve() instead of Dns.GetHostByName.