private void newButton_Click(object sender, EventArgs e) { if (MainWindow.Instance.CurrentMap.GetRegion(newNameTextBox.Text) != null) { MessageBox.Show("A region with that name already exists"); return; } Client.Game.Map.Region r = new Client.Game.Map.Region { Name = newNameTextBox.Text, BoundingRegion = new Common.Bounding.Region() }; MainWindow.Instance.CurrentMap.Regions.Add(r); regionsListBox.Items.Add(r); regionsListBox.SelectedItem = r; newNameTextBox.Text = ""; }