private void buttonOpenRange_Click(object sender, EventArgs e) { RawRange tempr = range.GetRange( radioButtonSelectPeriod.Checked, radioButtonSelectYearMonth.Checked, dateTimePickerFrom.Value, dateTimePickerTo.Value, comboBoxYear.SelectedItem, comboBoxMonth.SelectedItem ); if (tempr == null) { throw new Exception("что-то совсем не так!!"); } tempr.Name = range.Name + $" {tempr.First().Date:dd.MM.yyyy} - {tempr.Last().Date:dd.MM.yyyy}"; _ = Program.winMain.mainTabControl.OpenNewTab(tempr, tempr.Name).Focus(); Close(); }