private void editToolStripMenuItem_Click(object sender, EventArgs e) { if (this.objectListView1.SelectedObject != null) { Guest nGuest = (Guest)this.objectListView1.SelectedObject; InputForm nInput = new InputForm(nGuest); nInput.ShowDialog(); if (nInput.DialogResult == DialogResult.OK) { nGuest.Copy(nInput.NewGuest); this.objectListView1.RefreshObject(nGuest); this.RefreshGuestsCount(); } } }