private void AddNames_Click(object sender, EventArgs e)
        {
            InputForm modelessDialog = new InputForm();

            modelessDialog.AcceptClicked += ModelessClick;
            modelessDialog.ShowDialog();
        }
        private void ModelessClick(object sender, EventArgs e)
        {
            InputForm inForm       = (InputForm)sender;
            var       listViewItem = new ListViewItem();

            listViewItem.Text = inForm.input;
            listView1.Items.Add(listViewItem);
        }