ASP.NET

namespace MvcDemoApp.Models
   {
       public class Employee
       {
           public int EmployeeID { get; set; }
           public string Name { get; set; }
           public string Gender { get; set; }
           public string City { get; set; }

       }

       public class EmployeeContext : DbContext
       {
           public DbSet<Employee> employees { get; set; }
       }
   }

public ActionResult Index()
  {
             var c = db.employees.ToList();
             return View(c);
  }

protected void btn_dwn_Click(object sender, EventArgs e)
        {
            string File = ListBox1.SelectedValue;

            Response.ContentType = ContentType;
            Response.AppendHeader("Content-Disposition", "attachment; filename=" + Path.GetFileName(File));
            Response.End();
}

string[] file = null;
int idx;
protected void Page_Load(object sender, EventArgs e)
{
    DirectoryInfo dinfo = new DirectoryInfo(@"\\192.168.5.10\fbar\TOOLS\ProbingApps\ProbingSystem\DesktopCopyTemp");
    FileInfo[] Files = dinfo.GetFiles("*.txt");
    foreach (FileInfo file in Files)
    {
        ListBox1.Items.Add(file.Name);
    }

}

public class UserViewModel
    {
        [Required]
        [Display(Name = "Email")]
        [EmailAddress]
        public string Email { get; set; }

        [Required]
        [Display(Name = "Enabled")]
        public Boolean Enabled {get; set; }
        [Required]
        [Display(Name ="Active")]
        public Boolean Active { get; set; }
        [Required]
        [Display(Name = "Lockout date and time")]
        public DateTime? LockoutEndDateUtc { get; set; }
        [Required]
        [Display(Name ="Lockout enabled")]
        public Boolean LockoutEnabled { get; set; }
    }

    public class UserListViewModel
    {
        private ICollection<UserViewModel> _UserList = new List<UserViewModel>();
        public UserListViewModel( ApplicationDbContext ctx)
        {
            UserViewModel User;
            foreach (var user in ctx.Users)
            {
                User = new UserViewModel();
                User.Email = user.Email;
                User.Active = user.Active;
                User.Enabled = user.Enabled;
                User.LockoutEnabled = user.LockoutEnabled;
                User.LockoutEndDateUtc = user.LockoutEndDateUtc;
            }
        }

protected void ListBox1_SelectedIndexChanged(object sender, EventArgs e)
       {
           DirectoryInfo dinfo = new DirectoryInfo(@"C:\Users\Probing\Desktop");
           FileInfo[] Files = dinfo.GetFiles("*.txt");
           foreach (FileInfo file in Files)
           {
               ListBox1.Items.Add(file.Name);
           }