private void DeleteUsers()
 {
     using (P210_WeekendProductsEntities db = new P210_WeekendProductsEntities())
     {
         for (int i = 0; i < dgvUsers.SelectedRows.Count; i++)
         {
             int  userId = (int)dgvUsers.SelectedRows[i].Cells[0].Value;
             User user   = db.Users.FirstOrDefault(u => u.Id == userId);
             user.Status = false;
         }
         db.SaveChanges();
     }
     FillUsers();
 }
        private void FillUsers()
        {
            dgvUsers.Rows.Clear();
            using (P210_WeekendProductsEntities db = new P210_WeekendProductsEntities())
            {
                List <User> users = db.Users.ToList();
                foreach (var u in users)
                {
                    dgvUsers.Rows.Add(u.Id,
                                      u.Name,
                                      u.Surname,
                                      u.Email);

                    if (!u.Status)
                    {
                        dgvUsers.Rows[dgvUsers.Rows.Count - 1].DefaultCellStyle.BackColor = Color.Red;
                    }
                }
            }
        }