using System;
using System.Net;
using System.Net.NetworkInformation;

public class Test
{
    static string GetFQDN()
    {
        string domainName = IPGlobalProperties.GetIPGlobalProperties().DomainName;
        string hostName = Dns.GetHostName();

        if(!hostName.EndsWith(domainName))
        {
            hostName += "." + domainName;
        }

        return hostName;
    }

	public static void Main()
	{		
	    Console.WriteLine("GetFQDN() => \"{0}\"", GetFQDN());
		Console.WriteLine("GetHostEntry() => \"{0}\"", System.Net.Dns.GetHostEntry("localhost").HostName);
		Console.WriteLine("Resolve() => \"{0}\"", System.Net.Dns.Resolve("localhost").HostName);

	}
}