Copy path shell utility

#define TESTINGde

using System;
using System.Collections.Generic;
using System.Collections;
using System.ComponentModel;
using System.Data;
using System.Text;
using System.Threading;
using System.IO;
using System.Net;
using System.Diagnostics;
using System.Xml;
using System.Xml.Serialization;
using System.Configuration;
using System.Globalization;
using System.Reflection;
using System.Data.Common;

using System.Windows.Forms;
using System.Drawing;
using System.Drawing.Design;
using System.Drawing.Printing;
using System.Drawing.Imaging;
using System.Deployment;
using System.Deployment.Application;
using Microsoft.Win32;



namespace CopyPathShellUtility {
    static class Program {
        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main(string[] args) {
            try {
                if (args.Length == 0) {
                    Application.EnableVisualStyles();
                    Application.SetCompatibleTextRenderingDefault(false);
                    Application.Run(new Form1());
                    return;
                }
                for (int i = 0; i < args.Length; i++) {
                    args[i] = "\"" + args[i] + "\"";
                }

                Clipboard.SetText(string.Join(Environment.NewLine, args));
#if TESTING
                string msgOK = Clipboard.GetText();
                MessageBox.Show(
                  Form.ActiveForm,
                  msgOK,
                  Application.ProductName,
                  MessageBoxButtons.OK,
                  MessageBoxIcon.Information,
                  MessageBoxDefaultButton.Button1);
#endif
                string regKey = @"HKEY_CURRENT_USER\Software\CopyPathShellUtility\";
                for (int i = 0; i < args.Length; i++) {
#if TESTING
                    Trace.TraceInformation(string.Format("Copied path {0} to clipboard", args[i]));
#endif
                    Registry.SetValue(regKey, args[0], DateTime.Now);
                }
            }
            catch (Exception ex) {
                string msgError = ex.ToString();
                MessageBox.Show(
                    Form.ActiveForm,
                    msgError,
                    Application.ProductName,
                    MessageBoxButtons.OK,
                    MessageBoxIcon.Error);
            }

            return;

        }

    }
}