private void btnCreateRule_Click(object sender, EventArgs e) { if (ruleGenerator == null) { ruleGenerator = new FrmCreateRule(); ruleGenerator.FormClosed += ruleGenerator_FormClosed; ruleGenerator.ShowDialog(); } else { ruleGenerator.BringToFront(); } }
void ruleGenerator_FormClosed(object sender, FormClosedEventArgs e) { ruleGenerator = null; }