private void espejoVerticalToolStripMenuItem_Click(object sender, EventArgs e) { try { ImageForm Image1 = (ImageForm)ActiveMdiChild; ImageForm ImageVertical = new ImageForm(); ImageVertical.MdiParent = this; ImageVertical.vertical(Image1.getPicture()); ImageVertical.Show(); } catch (NullReferenceException) { MessageBox.Show("No hay ninguna foto seleccionada"); } }