private void btn_run_Click(object sender, EventArgs e) { int cnt; TagLogFileSizeLimit = int.Parse(textBox1.Text) * 1024 * 1024; TagLogFileLimit = int.Parse(textBox2.Text); TagLogFileCurrentNumber = 1; if (checkBoxTagLog.Checked) { MessageBox.Show("Old Tag Log Files will be delete!!!"); for (cnt = 1; cnt <= TagLogFileLimit; cnt++) { string TagLogFileName = "TagLog" + cnt + ".csv"; File.Delete(TagLogFileName); } } if (_mainForm != null) { _mainForm.Start(); } }