public Form1() { InitializeComponent(); webExtractor1 = new WebExtractor(webBrowser1); view1 = new View(textBox1, textBox2, listView1, listView2, dateTimePicker1, webExtractor1); webExtractor1.addObserver(view1); ListInit init = new ListInit(); for (int i = 0; i < init.Codes.Count; i++) { string line = string.Format("{0} - {1}", init.Codes.ElementAt(i), init.Descriptions.ElementAt(i)); ListViewItem item = new ListViewItem(line); item.Tag = init.Codes.ElementAt(i); listView1.Items.Add(item); item = new ListViewItem(line); item.Tag = init.Codes.ElementAt(i); listView2.Items.Add(item); } }