private void Item_CheckStateChanged(object sender, EventArgs e) { try { CheckBox cb = sender as CheckBox; if (cb.CheckState == CheckState.Checked) { if (cb.Text == "Сумма долга не мение (грн)") { _isConditionWithMinSumSelected = true; if (textBox_summa.Text.Length < 1) { textBox_summa.Text = "300"; } } LetterManager.ChangeConditionUsing(cb.Name, true); } else { if (cb.Text == "Сумма долга не мение (грн)") { _isConditionWithMinSumSelected = false; if (textBox_summa.Text.Length < 1) { textBox_summa.Text = "0"; } } LetterManager.ChangeConditionUsing(cb.Name, false); } RefreshToolStripPin(); } catch (Exception ex) { MessageBox.Show("Exception from WinFormsFace.Form_main.Item_CheckStateChanged() " + ex.Message); } }