private void lecturasToolStripMenuItem_Click_1(object sender, EventArgs e)
{
lecturas = new Lecturas();
lecturas.MdiParent = this;
lecturas.Show();
}
private void lecturasToolStripMenuItem_Click(object sender, EventArgs e)
{
//if (lecturas == null)
//{
lecturas = new Lecturas();
//}
lecturas.MdiParent = this;
lecturas.Show();
}