void Button_end(object sender, PageEventArgs e) { var newTable = WizardSQLHelper.TitleToSystemName(txtTable.Text); if (Tools.isTableExist(newTable)) { MetroMessageBox.Show(this, Properties.Resources.TableAlreadyExist, Properties.Resources.Error, MessageBoxButtons.OK, MessageBoxIcon.Error); e.Cancel = true; return; } e.Cancel = !WizardSQLHelper.ConvertFieldToList(_view, _field, newTable, this); }