private void agregarTurnoToolStripMenuItem_Click(object sender, EventArgs e)
{
if (turn == null)
{
turn = new frmAgregarTurnos();
turn.MdiParent = this;
turn.FormClosed += new FormClosedEventHandler(turn_FormClosed);
turn.Show();
}
}
void turn_FormClosed(object sender, EventArgs e)
{
turn = null;
}