How do I refresh images of imagelist in listview?

private void Form1_Load(object sender, EventArgs e)
       {
           show_all_items();
       }
       
       public void show_all_items()
       {
           
           lv_main.Items.Clear();

           using (SQLiteConnection conn = new SQLiteConnection(strConn))
           {
               conn.Open();

               string str_select = "SELECT * FROM cars limit 30";

               using (SQLiteCommand cmd = new SQLiteCommand(str_select, conn))
               {
                   using (SQLiteDataReader rdr = cmd.ExecuteReader())
                   {
                       while (rdr.Read())
                       {
                           ListViewItem item = new ListViewItem();

                           ImageList imgList = new ImageList();

                           imgList.Images.Add(LoadImage(rdr["thumnail_url"].ToString()));
                           imgList.ImageSize = new Size(55, 40);
                           
                           lv_main.SmallImageList = imgList;

                           item.ImageIndex = 0;


                           item.SubItems.Add(rdr["carName"].ToString());
                           item.SubItems.Add(rdr["mission"].ToString());
                           item.SubItems.Add(rdr["born"].ToString());
                           item.SubItems.Add(rdr["gas"].ToString());
                           item.SubItems.Add(rdr["mile"].ToString());
                           item.SubItems.Add(rdr["price"].ToString());
                           item.SubItems.Add(rdr["color"].ToString());



                           DateTime regDate = (DateTime)rdr["regDate"];
                           item.SubItems.Add(regDate.ToShortDateString());

                           lv_main.Items.Add(item);


                        }
                       rdr.Close();
                   }
               }

               conn.Close();
           }



       }
       private Image LoadImage(string url)
       {
           System.Net.WebRequest request =
               System.Net.WebRequest.Create(url);

           System.Net.WebResponse response = request.GetResponse();
           System.IO.Stream responseStream =
               response.GetResponseStream();

           Bitmap bmp = new Bitmap(responseStream);

           responseStream.Dispose();

           return bmp;
       }

   }