Program.cs

using System;
using System.Collections.Generic;
using System.Linq;
using System.Windows.Forms;

namespace MoyaSignup
{
    static class Program
    {
        public static Form1 form1;

        /// <summary>
        /// The main entry point for the application.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);

            System.Reflection.Assembly a = System.Reflection.Assembly.GetExecutingAssembly();
            Version appVersion = a.GetName().Version;
            string appVersionString = appVersion.ToString();

            if (Properties.Settings.Default.ApplicationVersion != appVersion.ToString())
            {
                Properties.Settings.Default.Upgrade();
                Properties.Settings.Default.ApplicationVersion = appVersionString;
            }

            form1 = new Form1();

            Application.Run(form1);
        }
    }
}