private void edit_hallButton_Click(object sender, EventArgs e)
{
Hall.Hall_info hi = new Hall.Hall_info();
hi.intial("add", "");
//hh.MdiParent = this;
hi.Show();
}
private void hall_infoTSMI_Click(object sender, EventArgs e)
{
Hall.Hall_info hh = new Hall.Hall_info();
hh.MdiParent = this;
hh.Show();
}