private void Form1_Load(object sender, EventArgs e)
            {
                wifi = new Wifi();
                List<AccessPoint> aps = wifi.GetAccessPoints();

                foreach (AccessPoint ap in aps)
                {
                    ListViewItem lvItem = new ListViewItem(ap.Name);
                    lvItem.SubItems.Add(ap.SignalStrength + "%");
                    lvItem.Tag = ap;

                    listNet.Items.Add(lvItem);

                }
            }

            private void button1_Click_1(object sender, EventArgs e)
            {
                if (listNet.SelectedItems.Count > 0 && textBox1.Text.Length > 0)
                {
                    ListViewItem selectedItem = listNet.SelectedItems[0];

                    AccessPoint ap = (AccessPoint)selectedItem.Tag;

                    if (connectToWifi(ap, textBox1.Text))
                        label2.Text = "Есть контакт " + ap.Name;
                    else
                        label2.Text = "Пробуй еще";
                }
                else
                    label2.Text = "Введи пароль";
            }

ListViewItem lvItem = new ListViewItem(ap.Name);
                lvItem.SubItems.Add(ap.SignalStrength + "%");

ListViewItem selectedItem = listNet.SelectedItems[0];