private void AddHost() { AddNewHostForm addNewHostForm = new AddNewHostForm(); addNewHostForm.ShowDialog(); if (addNewHostForm.NewHosts.Count > 0) { int id = this.Hosts.Count; foreach (Host host in addNewHostForm.NewHosts) { host.Id = id++; this.hosts.Add(host); this.AddNewListViewItem(host); } this.modifed = true; CheckSaveStatus(); } }