private void button5_Click(object sender, EventArgs e)
{
var id = listView1.SelectedItems[0].Index;
var inforow = new addedit(mainList[id], mainList);
var dialog = inforow.ShowDialog(this);
if (dialog == DialogResult.OK)
{
mainList[id] = inforow.info;
listView1.Items[id] = new ListViewItem(new string[] {
mainList[id].PhoneNumber,
mainList[id].FullName,
mainList[id].Tariff.ToString()
});
}
}