C#

static void Main()
        {
            //Application.EnableVisualStyles();
            //Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new ListView1());
        }

using System;
using System.Collections.Generic;
using System.Windows.Forms;
using System.IO;
using ListView;

namespace WindowsApplication19
{
    static class Program
    {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            //Application.EnableVisualStyles();
            //Application.SetCompatibleTextRenderingDefault(false);
            Application.Run(new ListView1());
        }
    }
}

String ss = listBox1.SelectedItem.ToString();

String ss;
if(listBox1.SelectedIndex >= 0)
    ss = listBox1.SelectedItem.ToString();
else
    ss = listBox1.Items[0].ToString(); //this will select the first item in the listbox

FileStream fs = new FileStream("FilePath", FileMode.Open);
Image.FromStream(fs);
fs.Close();

Image img = Image.FromStream(fs);

Eddy Vluggen wrote:

I prefer to return "null"

Rob Philpott wrote:

Exceptions in constructors is fine then

namespace NKUtilities 
{
    using System;
    using System.Net;
    
    public class DNSUtility
    {
        public static int Main (string [] args)
        {
        
          String strHostName = new String ("");
          if (args.Length == 0)
          {
              // Getting Ip address of local machine...
              // First get the host name of local machine.
              strHostName = Dns.GetHostName ();
              Console.WriteLine ("Local Machine's Host Name: " +  strHostName);
          }
          else
          {
              strHostName = args[0];
          }
          
          // Then using host name, get the IP address list..
          IPHostEntry ipEntry = DNS.GetHostByName (strHostName);
          IPAddress [] addr = ipEntry.AddressList;
          
          for (int i = 0; i < addr.Length; i++)
          {
              Console.WriteLine ("IP Address {0}: {1} ", i, addr[i].ToString ());
          }
          return 0;
        }    
     }
}