//Menu editar private void editarEmailsToolStripMenuItem_Click(object sender, EventArgs e) { if (Application.OpenForms.OfType <frmManterEmail>().Count() > 0) { MessageBox.Show("Formulario manutenção de emails já está aberto!", "Aviso"); } else { frmManterEmail telaManterEmails = new frmManterEmail(); telaManterEmails.ShowDialog(); } }
//Menu editar private void editarEmailsToolStripMenuItem_Click(object sender, EventArgs e) { if (Application.OpenForms.OfType<frmManterEmail>().Count() > 0) { MessageBox.Show("Formulario manutenção de emails já está aberto!", "Aviso"); } else { frmManterEmail telaManterEmails = new frmManterEmail(); telaManterEmails.ShowDialog(); } }