ARABOSIK/Program.cs

using System;
using System.Collections.Generic;
using System.Data;
using System.Data.SqlClient;
using System.Linq;
using System.Threading.Tasks;
using System.Windows.Forms;

namespace Демо
{
    static class Program
    {
        public static Form mainf { get; set; }
        /// <summary>
        /// Главная точка входа для приложения.
        /// </summary>
        [STAThread]
        static void Main()
        {
            Application.EnableVisualStyles();
            Application.SetCompatibleTextRenderingDefault(false);
            mainf = new Авторизация();
            while (mainf != null)
            {
                Application.Run(mainf);
            }
            Application.Exit();
        }

        public static void conn(out SqlConnection cn)
        {
            string ConnStr = "Data Source=(local);Initial Catalog=\"Школа языков\";Integrated Security=True";
            cn = new SqlConnection(ConnStr);
            cn.Open();
        }

        internal static class Role 
        {
            public static string email { get; set; }
            public static int id { get; set; }
            public static DataTable table { get; set; }
        }
    }
}