C# to resolve list of domains

DGAtester.cs

using System;
using System.Collections.Generic;
using System.IO;
using System.Linq;
using System.Net;
using System.Text;
using System.Threading.Tasks;

namespace DGAtester
{
    class Program
    {
        public static void DoGetHostEntry(string hostname)
        {
            IPHostEntry host;
            ServicePointManager.DnsRefreshTimeout = 0;
            host = Dns.GetHostEntry(hostname);
            Console.WriteLine("GetHostEntry({0}) returns:", hostname);
            foreach (IPAddress ip in host.AddressList)
            {
                Console.WriteLine("    {0}", ip);
            }
        }

        static void Main(string[] args)
        {
            if (args.Length == 0)
            {
                Console.WriteLine("Please enter text file containing DGA domains.");
                return;
            }
            try
            {
                foreach (string line in File.ReadLines(args[0]))
                {
                    Console.WriteLine("Rsolving {0}..", line);
                    try
                    {
                        DoGetHostEntry(line);
                    }
                    catch(Exception)
                    {

                    }
                }
            }
            catch(Exception e)
            {
                Console.WriteLine("Oops.. " + e.ToString());
            }
            
        }
    }
}