private void Editar()
{
MateriasEditar editar = null;
editar = MateriasEditar.Instancia();
editar.MdiParent = MdiAdmin.ActiveForm;
editar.Show();
this.Close();
}
public static MateriasEditar Instancia()
{
if (frmInst == null || frmInst.IsDisposed == true)
{
frmInst = new MateriasEditar();
}
frmInst.BringToFront();
return(frmInst);
}