void Accessoriesdb()
        {
            accessories.Clear();
            String        sql = "Data Source=DESKTOP-8TO2TNB;Initial Catalog=car_sales;Integrated Security=True";
            SqlConnection con = new SqlConnection(sql);

            con.Open();
            accessories.Clear();
            string        query  = "SELECT *FROM accessories_inf where customerid is null ";
            SqlCommand    cmd    = new SqlCommand(query, con);
            SqlDataReader reader = cmd.ExecuteReader();

            while (reader.Read())
            {
                Accessories_Class a = new Accessories_Class
                {
                    accessories_id      = reader.GetInt32(0),
                    accessories_name    = reader.GetString(1),
                    accessories_type    = reader.GetString(2),
                    accessories_picture = (byte[])reader["picture"],
                    accessories_price   = reader.GetString(4),
                    customer_id         = xx
                };

                accessories.Add(a);
            }
        }
        public void addaccess(Accessories_Class a)
        {
            label1.Text = a.accessories_name;
            label2.Text = a.accessories_price;
            label3.Text = a.accessories_id.ToString();
            MemoryStream mem = new MemoryStream(a.accessories_picture);

            mem.Seek(0, SeekOrigin.Begin);
            pictureBox1.Image = Image.FromStream(mem);
            label4.Text       = "access";
            label5.Text       = a.customer_id.ToString();
        }