private void facultadToolStripMenuItem1_Click(object sender, EventArgs e) { Form frmC = Application.OpenForms.Cast <Form>().FirstOrDefault(x => x is ConsultFacultad); if (Consult_3 == false || frmC == null) { if (frmC == null) { consult_3 = new ConsultFacultad(); } consult_3.MdiParent = this; consult_3.Show(); Application.DoEvents(); Consult_3 = true; } else { consult_3.WindowState = System.Windows.Forms.FormWindowState.Normal; } }