private void AddOffset() { frmOffset dialog = new frmOffset(frmOffset.Mode.Add); DialogResult r = dialog.ShowDialog(); if (r == DialogResult.OK) { var settings = dialog.GetSettings(); string[] offsetRow = { settings.Phase.ToString(), settings.Amplitude.ToString() }; // Add the offset to the listview var offsetItem = new ListViewItem(offsetRow); this.lsvOffsets.Items.Add(offsetItem); } }