private void sobreToolStripMenuItem_Click(object sender, EventArgs e)
{
frmSobre frmsobre = new frmSobre();
frmsobre.MdiParent = this;
frmsobre.WindowState = FormWindowState.Maximized;
frmsobre.Show();
}
private void sobreToolStripMenuItem_Click(object sender, EventArgs e)
{
var instancec = Application.OpenForms.OfType <frmSobre>().FirstOrDefault();
if (instancec == null)
{
instancec = new frmSobre();
instancec.Show();
}
else
{
//instancec.Focus();
}
}